Review of Gonatocerus (Hymenoptera: Mymaridae) in the Palaearctic region, with notes on extralimital distributions.

The Palaearctic species of the common and speciose fairyfly genus Gonatocerus Nees ab Esenbeck (Hymenoptera: My-maridae) are reviewed. Illustrated identification keys are provided to separate the three subgenera of Gonatocerus that oc-cur in the region and to females of the species in each subgenus. Distribution ranges, including new records of extralimital specimens examined, and known host associations of the species are given. Forty-two valid taxa are recognized including 19 newly described ones: two in G. (Gonatocerus)­G. bukashka sp. n. (Denmark, Russia) and G. koziavka sp. n. (Kyr-gyzstan), 15 in G. (Lymaenon Walker)­G. berezovskiyi sp. n. (Turkmenistan), G. beshbarmak sp. n. (Kyrgyzstan), G. ka-lika sp. n. (Denmark), G. karakum sp. n. (Italy, Turkmenistan), G. karlik sp. n. (China, Republic of Korea, Russia), G. katraps sp. n. (Republic of Korea, Russia), G. kazak sp. n. (Russia, Spain), G. komarik sp. n. (France), G. krasavchik sp. n. (Russia), G. kulik sp. n. (Russia), G. kum sp. n. (Russia), G. kusaka sp. n. (Russia), G. saulfrommeri sp. n. (Russia), G. svat sp. n. (China), G. ucri sp. n. (Russia), and two in G. (Cosmocomoidea Howard)­G. kikimora sp. n. (Russia) and G. woohoo sp. n. (Russia). New synonymies are proposed for the following names: G. (Gonatocerus) fuscicornis (Walker) [= G. sulphuripes (Foerster) syn. n., G. pictosimilis Soyka syn. n., Lymaenon synaptus Debauche syn. n., L. alecto De-bauche syn. n., and L. crassipes Debauche syn. n.]; G. (Gonatocerus) aegyptiacus Soyka [= G. saipanensis (Doutt) syn. n., G. alami Shamim & Shafee syn. n., G. tarae Narayanan & Subba Rao syn. n., G. miurai Sahad syn. n., and G. minor Matthews syn. n.]; G. (Gonatocerus) pictus (Haliday) [= G. orthopenitus Guo, Lin & Hu syn. n.]; G. (Lymaenon) aureus Girault [= G. tenuipennis Girault syn. n., G. chrysis (Debauche) syn. n., G. vopros nom. n. pro G. flavus Soyka, 1950 (nec G. flavus Foerster, 1841) syn. n., G. pahlgamensis (Narayanan) syn. n., G. kanheriensis Mani & Saraswat syn. n., G. grac-ilentus Hellén syn. n., G. aligarhensis Shamim & Shafee syn. n., and G. fukuokensis Sahad syn. n.]; G. (Lymaenon) lito-ralis (Haliday) [= Alaptus fuscus Förster syn. n., G. exiguus Förster syn. n., G. americanus Brues syn. n., G. anthonomi Girault syn. n., G. brunneus Girault syn. n., G. illinoiensis Girault syn. n., G. maevius Girault syn. n., G. texanus Girault syn. n., and G. priesneri Soyka syn. n.]; G. (Lymaenon) longior Soyka [= G. conicus (Mathot) syn. n.]; G. (Cosmoco-moidea) oxypygus Foerster [= G. ovicenatus Leonard & Crosby syn. n. and G. megalura (Mathot) syn. n.]. Lymaenon cunctator Mathot is reinstated as a valid species, G. (Lymaenon) cunctator (Mathot) stat. rev., based on study of its holo-type. Lectotypes are designated for Alaptus fuscus, Gonatocerus anthonomi, G. ater Foerster, G. brunneus, G. exiguus, G. texanus, Lymaenon fuscicornis Walker, L. tremulae Bakkendorf, and Rachistus sulphuripes Foerster. Neotypes are designated for G. aureus and G. oxypygus.

Egg parasitoids (Hymenoptera: Mymaridae and Trichogrammatidae) of the gall-making leafhopper Scenergates viridis (Hemiptera: Cicadellidae) from Uzbekistan, with taxonomic notes on the Palaearctic species of Aphelinoidea.

A new species of the Aphelinoidea Girault (Hymenoptera: Trichogrammatidae), A. (Aphelinoidea) sariq Triapitsyn & Rakitov sp. n., is described from Uzbekistan. Both sexes were reared from eggs of the only known truly gall-making leafhopper, Scenergates viridis (Vilbaste), laid inside its galls on camelthorn, Alhagi maurorum Medikus; additional females were found dead inside the galls. Aphelinoidea sariq is the only known species of the nominate subgenus of Aphelinoidea whose body color is predominantly yellow. Taxonomic notes on other Palaearctic species of Aphelinoidea are provided; A. scythica Fursov, syn. n. is synonymized underA. (Aphelinoidea) turanica S. Trjapitzin. Another trichogrammatid, Par-acentrobia (Paracentrobia) sp., was reared from eggs of S. viridis in much smaller numbers. Also described from the same locality and host is Gonatocerus (Lymaenon) mitjaevi Triapitsyn & Rakitov sp. n. (Hymenoptera: Mymaridae).

Descriptions of two new species of Gonatocerus (Hymenoptera: Mymaridae) from southeastern Europe.

Two new taxa, Gonatocerus (Lymaenon) bulgaricus Donev & Triapitsyn (Bulgaria, and also apparently mainland Greece) and G. (Lymaenon) mediterraneus Donev & Triapitsyn (Greece-Crete Island) are described, diagnosed, and illustrated. Also, a species tentatively identified as G (Lymaenon) ?beshbarmak Triapitsyn is reported from mainland Greece. If the species is indeed G. beshbarmak then this is the first record of it from Greece.

Two new host records for Centrodoraitalica Ferrière (Hymenoptera, Aphelinidae) from eggs of Tettigoniidae (Orthoptera, Ensifera) in northeastern Italy.

The egg parasitoid Centrodoraitalica Ferrière is reported for the first time from sentinel eggs of two species of Tettigoniidae (Orthoptera), Pachytrachisgracilis (Brunner von Wattenwyl) and Eupholidopteraschmidti (Fieber). In Italy, only two hosts of this parasitic wasp are known, one of which is a tettigoniid species. Exposure of sentinel eggs represented a useful method to detect new host associations of this parasitoid species that can search for their host's eggs in the ground. The parasitoids were identified by comparing our specimens with those of the type series, and the original description of C.italica.

Key to Ooctonus Haliday (Hymenoptera: Mymaridae) in China, with one new species and three new country records.

A new species of Ooctonus Haliday (Hymenoptera: Mymaridae), O. innermongolicus Aishan Hu sp. nov., is described from Inner Mongolia and Tibet, China. Eight other species of the genus, including the three new records O. hemipterus Haliday, O. lokomotiv Triapitsyn and O. spartak Triapitsyn, are also reported and illustrated. A key to females is provided for the 18 species of Ooctonus known from China.

Taxonomic review of Polynema (Hymenoptera: Mymaridae) in Australia and New Zealand, with descriptions of eight new species.

Two Australian species of Polynema Haliday (Hymenoptera: Mymaridae), P. (Polynema) draperi Girault and P. (Polynema) editha Girault, are redescribed, as is the Australasian and Oriental P. (Dorypolynema) mendeli Girault; the previously unknown female of P. draperi and male of P. editha are also described. One new species group, the draperi group, is newly defined in P. (Polynema), in which eight new species are described: P. (Polynema) aristokratka sp. n. (New Zealand), P. (Polynema) baronessa sp. n. (New Zealand), P. (Polynema) grafinya sp. n. (New Zealand), P. (Polynema) imperatrix sp. n. (Australia), P. (Polynema) koroleva sp. n. (New Zealand), P. (Polynema) markiza sp. n. (New Zealand), P. (Polynema) princessa sp. n. (Australia), and P. (Polynema) rangatira sp. n. (New Zealand). Keys to the two treated subgenera of Polynema, both sexes of the world species of P. (Dorypolynema Hayat Anis), and to females of the 10 described P. (Polynema) species in Australia and New Zealand are given. Taxonomic notes are provided for the Afrotropical species Polynema (Dorypolynema) mboroense (Risbec), comb. n. from Acmopolynema Ogloblin, whose previously unknown female is described, and for the Australian species Palaeoneura frater (Girault), comb. n. from Polynema.

Anagrus avalae Soyka, 1956, a new synonym of A. bakkendorfi Soyka, 1946 (Hymenoptera: Mymaridae).

Soyka (1946) described the European fairyfly species Anagrus bakkendorfi Soyka (Hymenoptera: Mymaridae) from a single female collected on the same day, 7.x.1931, together with several non-type specimens incorrectly labeled as paratypes (Chiappini Triapitsyn 1999), on a window at its type locality, the former St. Ignatius Jesuit College in Valkenburg, Limburg, the Netherlands. Soyka (1956) did not mention type specimens of any of his species of Anagrus Haliday. He described Anagrus avalae Soyka (Soyka 1956) based apparently on a specimen collected on Mt. Avala, Belgrade, Serbia, former Yugoslavia, along with several other nominal species (some also from Valkenburg) that were later synonymized with A. avalae and A. bakkendorfi by Chiappini (1989) and Chiappini Triapitsyn (1999). The only, minor, morphological difference between the two nominal species is the length of the ovipositor in females relative to the length of the protibia, being at least 2.6× in A. bakkendorfi and at most 2.3× in A. avalae (Triapitsyn 2015). Specimens identifiable as both species were captured by the second author in 2000 by a Malaise trap in Iratibizkar, Irati Forest (Selva de Irati), Navarra, Spain. Chiappini Triapitsyn (1999) discussed both nominal species but despite recognizing their apparent conspecificity, no formal synonymy was proposed. Triapitsyn Berezovskiy (2004) and Triapitsyn (2015) also did not propose synonymy because at that time genetic evidence for conspecificity was lacking. However, Triapitsyn et al. (2019) obtained DNA and sequenced selected mitochondrial and nuclear ribosomal gene regions (COI and ITS2) from a specimen unambiguously identified by the first author as A. avalae that was collected in Sevenoaks, Kent County, England, United Kingdom. Because of this we decided to collect fresh specimens identifiable as A. bakkendorfi for molecular analysis and genetic comparison with those identifiable as A. avalae. Based on the previous record (Triapitsyn 2015), several females of A. bakkendorfi were successfully captured by the second author on 4.ix.2020 in Irati Forest, preserved in ethanol, and shipped to the first and third authors for morphological and molecular identification, respectively.

Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region.

Separate identification keys for females, and for males where known, of the 40 genera of Mymaridae (Hymenoptera: Chalcidoidea) in the Afrotropical region are given. The subgenera of four genera are also included in the key to females. The genera are illustrated with over 300 photographs. The 122 named, valid species reported from the region are catalogued. Reliable host records are reported for 6 genera and 11 species from rearings undertaken in the region. An appendix lists the 27 species from northern Africa and offshore islands (Canary Islands, Madeira) but not recorded in the Afrotropical region as defined in this publication. Camptoptera (Zemicamptoptera) Ogloblin Annecke, syn. n. is synonymized with Camptoptera (Camptoptera) Foerster. Eofoersteria Mathot, syn. n. is synonymized with Camptoptera Foerster and is treated as subgenus C. (Eofoersteria) Mathot, stat. n.; its type species Eofoersteria camptopteroides Mathot is transferred to Camptoptera as C. (Eofoersteria) camptopteroides (Mathot), comb. n. Polynema megacephala (Risbec) is transferred to Lymaenon as L. megacephala (Risbec), comb. n. Limacis opuntiae Risbec is transferred to Encarsia Foerster (Hymenoptera: Aphelinidae) as E. opuntiae (Risbec), comb. n. A few corrections to Huber et al. (2020) are given.

Re-collection and identity of Ooencyrtus californicus (Hymenoptera: Encyrtidae), and its new synonym, Ooencyrtus lucidus.

Girault (1917) very briefly described and diagnosed the encyrtid wasp species Ooencyrtus californicus Girault (Hymenoptera: Encyrtidae) with the following limited data (p. 22): "Sacramento, California, from bug eggs on Pinus sabiniana, September". The first author examined its two syntypes, poorly mounted on a slide, of which only parts of the four antennae and a slightly damaged fore wing remain (Triapitsyn et al. 2020). They concluded that this species was better considered a nomen dubium until fresh specimens could be collected from the same host plant in or near the type locality. In July 2019, an effort was made to re-collect O. californicus from foothill (or gray) pine, Pinus sabiniana (Pinaceae), in the Oakhurst area of Madera County, California, USA, where this pine is abundant, but no specimens were captured. At the same time, a very similar insect was collected from sentinel eggs of the invasive stink bug Bagrada hilaris (Burmeister) in Riverside, California. This insect was cultured in the laboratory as part of a B. hilaris biological control program. Due to the poor preservation of the type specimens and in the absence of genetic evidence, it was impossible to positively and properly attribute specimens of this newly collected parasitoid to O. californicus. Therefore, to provide a much needed scientific name for this native egg parasitoid, it was described as Ooencyrtus lucidus Triapitsyn Ganjisaffar in Triapitsyn et al. (2020). The two nominal species were separated based on minor differences in the proportions of the scape, pedicel, and first funicular segment of the female antenna (Triapitsyn et al. 2020). John S. Noyes, world expert on Encyrtidae and one of the reviewers of Triapitsyn et al. (2020), disagreed with the erection of O. lucidus as a new taxon based on the morphological similarities of the female antenna with that of O. californicus, so the description was published with the understanding that the two might be conspecific. But to settle this one way or another new specimens of O. californicus had to be collected to allow morphological and molecular analyses.

Influence of competition and intraguild predation between two candidate biocontrol parasitoids on their potential impact against Harrisia cactus mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae).

When two or more parasitoid species, particularly candidates for biocontrol, share the same target in the same temporal window, a complex of behaviors can occur among them. We studied the type of interactions (competition and intraguild predation) that existed between the nymphal parasitoids Anagyrus cachamai and A. lapachosus (Hymenoptera: Encyrtidae), two candidate neoclassical biocontrol agents against the Puerto Rican cactus pest mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae). The surrogate native congener host in Argentina, the cactus mealybug Hypogeococcus sp., was studied to predict which species should be released; in the case that both should be released, in which order, and their potential impact on host suppression. In the laboratory we conducted experiments where different densities of the host mealybug were exposed to naive females of A. cachamai and A. lapachosus sequentially in both directions. Experiments were analyzed by combining a series of competitive behavioral and functional response models. A fully Bayesian approach was used to select the best explaining models and calculate their parameters. Intraguild predation existed between A. cachamai, the species that had the greatest ability to exploit the resource, and A. lapachosus, the strongest species in the interference competition. The role that intraguild predation played in suppression of Hypogeococcus sp. indicated that a multiple release strategy for the two biocontrol agents would produce better control than a single release; as for the release order, A. lapachosus should be released first.

Description of the male of Tanyxiphium harriet (Hymenoptera: Mymaridae), with new distribution records and synonymy.

Tanyxiphium longissimum Huber, syn. n. (Hymenoptera: Mymaridae) is synonymized under T. harriet (Zeya) based on examination of specimens from Hainan Island and Yunnan Province in the Oriental part of China, Sulawesi Island in Indonesia, Peninsular Malaysia, and Thailand. These are new country distribution records except for Thailand. The previously unknown male of T. harriet is described from Sulawesi Island, and the female is redescribed and illustrated based on non-type material examined.

A review of the Chinese species of Lymaenon (Hymenoptera: Mymaridae), with description of six new species.

Twenty-two species of Lymaenon Walker (Hymenoptera: Mymaridae) from China are keyed; illustrations, taxonomic and other notes are also provided for some of these taxa. Six species are newly described: L. funiculus Aishan Hu sp. n., L. ledongus Aishan Hu sp. n., L. longitus Aishan Hu sp. n., L. naiquanlini Aishan Hu sp. n., L. radiculus Aishan Hu sp. n., and L. zhui Aishan Hu sp. n., all from the Oriental part of the country. Eleven species are newly recorded from China: L. bashai (Zeya), L. berijamus (Mani Saraswat), L. breviterebratus (Subba Rao), L. delhiensis Narayanan Subba Rao, L. katraps (Triapitsyn), L. kazak (Triapitsyn), L. krasavchik (Triapitsyn), L. longior (Soyka), L. narayani Subba Rao Kaur, L. sundus (Zeya Anwar), and L. tamilanus (Mani Saraswat).

Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico.

Identification keys for females, and for males where known, to the 39 genera and 11 subgenera of Mymaridae in America north of Mexico are given. The genera are illustrated with over 1010 photographs and/or scanning electron micrographs. The 202 currently named and valid species reported from America north of Mexico are catalogued. Reliable host records are reported for 16 genera and almost 90 species from rearings in the region. The five genera represented by more than one subgenus in the region are: Anagrus Haliday, Anaphes Haliday, Erythmelus Enock, Kalopolynema Ogloblin, and Polynema Haliday. Five other genera are represented only by unnamed and possibly undescribed species. About 1000 literature references, mainly the North American ones, are listed. Three new species are described: Callodicopus floridanus Huber, sp. n., Neostethynium americanum Huber, sp. n., and Stephanocampta xanthogaster Huber, sp. n. Cosmocomoidea marilandica (Girault), stat. rev., is placed in synonymy under C. dolichocerus (Ashmead). Platypatasson Ogloblin is given subgeneric status as Platystethynium (Platypatasson Ogloblin), stat. rev. Corrections and additions to the mymarid fauna of Mexico by Guzmán-Larralde et al. (2017) are also given.

Two new species of Camptopteroides (Camptopteroides) (Hymenoptera: Mymaridae) from the Oriental region with a key to Old World species.

An overview of the Oriental species of the nominate subgenus of Camptopteroides Viggiani (Hymenoptera: Mymaridae) is given. Two new species, C. (Camptopteroides) formosa Manickavasagam Sankararaman sp. n. from India and C. (Camptopteroides) reducta Triapitsyn sp. n. from Thailand and Malaysia, are described, and C. formosa additionally compared to two unnamed species. The holotype male of the type species of this genus, C. armata Viggiani from Sri Lanka, is diagnosed and illustrated. A key to Old World species of Camptopteroides is provided.

Egg parasitoids of Arboridia apicalis (Nawa, 1913) (Hemiptera, Cicadellidae), a leafhopper pest of grapevines in Japan, with description of a new species of Anagrus Haliday, 1833 (Hymenoptera, Mymaridae).

Several species of egg parasitoids (Hymenoptera: Mymaridae and Trichogrammatidae) of the leafhopper pest of grapevines in Japan, Arboridia (Arboridia) apicalis (Nawa) (Hemiptera, Cicadellidae), were reared and identified for the first time. Using a combination of genetic and morphological evidence, Anagrus (Anagrus) arboridiae Triapitsyn & Adachi-Hagimori, sp. nov. (Mymaridae) is described and illustrated from Honshu Island (Shimane Prefecture) and Kyushu Island (Miyazaki Prefecture). It is shown to be different from Anagrus (Anagrus) japonicus Sahad and A. flaviapex Chiappini & Lin, to which it is most similar; the latter species was originally described from China and is newly recorded here from Okinawa Island, Japan. Mitochondrial and nuclear ribosomal DNA sequence data provide clear evidence for the separation of A. arboridiae from A. flaviapex, A. japonicus, and some other members of the Anagrus (Anagrus) atomus (L.) species group. Two other species of Anagrus Haliday, A. (Anagrus) avalae Soyka and A. atomus, are also identified in Japan from eggs of the leafhoppers Edwardsiana ishidae (Matsumura) and Eurhadina ? betularia Anufriev, respectively. An updated key to females of the Japanese species of Anagrus is given. Oligosita pallida Kryger (a new record for Japan), Oligosita sp., and an Aphelinoidea (Aphelinoidea) sp. (Trichogrammatidae) were the other, although much less abundant, apparent egg parasitoids of A. apicalis in Shimane Prefecture, mainly in non-organic vineyards.

Egg parasitoids of proconiini (hemiptera: cicadellidae) in northwestern Mexico, with description of a new species of gonatocerus (hymenoptera: mymaridae).

Nine species of Mymaridae and Trichogrammatidae parasitic on eggs of Proconiini sharpshooters (Cicadellidae: Cicadellinae) were collected in northwestern Mexico in relation to neoclassical biological control efforts against glassy-winged sharpshooter, Homalodisca vitripennis (Germar), in California. Gonatocerus chula Triapitsyn and Bernal sp. n., which belongs to the ater species group of Gonatocerus Nees (Mymaridae), is described. Specimens of G. chula sp. n. were reared from eggs of the smoke-tree sharpshooter, Homalodisca liturata Ball, on jojoba [Simmondsia chinensis (Link) C. K. Schneider] leaves collected in central Sonora state, Mexico. Also given are new data on other egg parasitoids of Homalodisca spp. and Oncometopia spp. in Sinaloa and Sonora states, Mexico, including Gonatocerus atriclavus Girault, G. morrilli (Howard), and G. novifasciatus Girault, and the Trichogrammatidae Burksiella sp(p)., Ittys sp., Pseudoligosita sp., Ufens ceratus Owen, and U. principalis Owen. For the first time, a species of Ittys is recorded from eggs of Proconiini, and U. principalis from Mexico. Colonies of G. atriclavus, G. novifasciatus and Pseudoligosita sp. were successfully established in a quarantine laboratory at University of California, Riverside, on eggs of the glassy-winged sharpshooter. These three parasitoid species had never been reared under laboratory conditions. In addition, seven species of Proconiini were collected in central and northwestern Mexico: Cyrtodisca major (Signoret), Homalodisca insolita (Walker), H. liturata Ball, Oncometopia sp. cf. clarior (Walker), O. sp. cf. trilobata Melichar, O. (Similitopia) sp., and Phera centrolineata (Signoret). Oncometopia sp. cf. clarior, O. sp. cf. trilobata, and O. (Similitopia) sp. appeared to be undescribed species.

On the origin of Anagyrus callidus (Hymenoptera: Encyrtidae), a parasitoid of pink hibiscus mealybug Maconellicoccus hirsutus (Hemiptera: Pseudococcidae).

Anagyrus callidus Triapitsyn, Andreason Perring (Hymenoptera: Encyrtidae), recently described from southern California, USA and Mexico, is a primary parasitoid of the pink hibiscus mealybug, Maconellicoccus hirsutus (Green) (Hemiptera: Pseudococcidae). This wasp species previously was misidentified as Anagyrus kamali Moursi, which was introduced and released as such in the United States (California and Florida) and Mexico. In this paper, the origin of A. callidus is shown to be from Taiwan, based on differences in the morphology and molecular sequences of voucher specimens of an earlier colony of the misidentified A. kamali from Puerto Rico (released in August 2002 in southern Florida), and specimens that originated in southern Taiwan.

Development of a strategy for selective collection of a parasitoid attacking one member of a large herbivore guild.

Selectively collecting a single natural enemy species that parasitizes one member of a guild of herbivores that attack the same host plants can be a challenging problem during development of biological control programs. We present here a successful strategy for the collection of a strain of the egg parasitoid Avetianella longoi Siscaro (Hymenoptera: Encyrtidae), that parasitizes eggs of the longhorned borer Phoracantha recurva Newman (Coleoptera: Cerambycidae). This cerambycid is one member of a large guild of woodborers that simultaneously infest dying and fallen Eucalyptus in Australia, and it has become a major pest of Eucalyptus in many areas of the world where Eucalyptus has been introduced. Adult P. recurva of both sexes were caged on freshly cut Eucalyptus logs, and the resulting egg masses were marked and then left exposed to natural parasitization in the field. Parasitized egg masses were then harvested and held in the laboratory until adult parasitoids emerged. Parasitoids were identified as A. longoi by morphological comparisons with reference specimens, and with molecular markers. This strain of A. longoi readily accepted and had high survival rates in eggs of P. recurva. In contrast, the strain of A. longoi that has been used for biological control of P. semipunctata in California since the 1990s strongly prefers eggs of eucalyptus longhorned borer, Phoracantha semipunctata (F.) (Coleoptera: Cerambycidae), and has relatively low rates of survival to adulthood in eggs of P. recurva. The causes of these behavioral and physiological differences between the two strains are not yet known.

Revision of the Polynemadikobraz species-group with description of a remarkable new species from South Africa (Hymenoptera, Chalcidoidea, Mymaridae).

A new Afrotropical species of Polynema Haliday, 1833 (Hymenoptera: Mymaridae), Polynema (Polynema) sagittaria van Noort & Triapitsyn, sp. n., is described and illustrated based on specimens collected in the Cape Floral region in south-western South Africa. This species is morphologically closely related to the recently described Polynema (Polynema) dikobraz Triapitsyn, 2017 from Madagascar, both species possessing enlarged spine-like microtrichia on the fore wing disc that are unique among all the known world fairyflies. This new species belongs to the informal dikobraz species-group of the nominate subgenus of Polynema, which previously was only known from Madagascar. In addition, P.sagittaria has the ovipositor extending ventrally under the mesosoma to well in front of the head, in a bow-like curve, and housed in a narrow, anterior elongation of the metasoma, the basal sac. Occurrence and possible significance of such a bizarre ovipositor in other Mymaridae is discussed. All images and online keys are available on www.waspweb.org.

Five new species of Cleruchus from the Oriental region and report of Anaphes quinquearticulatus (Hymenoptera: Mymaridae) from India.

An overview of the Oriental species of Cleruchus Enock (Hymenoptera: Mymaridae) is given, and its five newly described species as well as one undescribed species from Malaysia are keyed. The described new taxa are C. funiculatus Manickavasagam Palanivel sp. n., C. indicus Manickavasagam Palanivel sp. n. and C. orientalis Manickavasagam Palanivel sp. n., all from India, C. blimp Triapitsyn sp. n. from Brunei, and C. pmilb Triapitsyn sp. n. from Thailand. Anaphes quinquearticulatus Huber Triapitsyn is newly reported from India.