Aleurocybotus mojavensis (Hemiptera: Sternorrhyncha: Aleyrodidae), a new whitefly species from California.

A new species of Aleurocybotus Quaintance Baker, 1914 found on grasses in the Mojave Desert in California, U.S.A., is described, figured, and diagnosed from its congeners. It can be easily recognized from A. occiduus Russell, 1964, the only other species of this genus present in California, by the copious white woolly wax secretions of its puparia and corresponding dorsal submarginal glandular band, and from A. cereus Martin, 2005, the only other Aleurocybotus species that produces large amounts of white wax, by its narrower glandular band, shape of vasiform orifice and operculum, and several other cuticular characters. A key to identify puparia of all described species of Aleurocybotus is provided.

Metaleptobasis daiglei sp. nov. from Panama (Odonata: Coenagrionidae).

Metaleptobasis daiglei sp. nov. (Holotype ♂: PANAMA, Colón Province, Portobelo District, palmetto/ banana swamp, west side of Río Piedras near town of María Chiquita, 10 am (9°27'4''N, 79°44'18''W, 10 m), 2 June 2022, Jerrell J. Daigle leg., in FSCA) is described, figured, and distinguished from other species. Both male and female can be recognized from all congeners by the presence of a lateral pit rimmed by an external ridge between anterior and middle lobes of pronotum on each side, and the male also by the presence of a well-developed ventral spur on cercus, which supports the placement of the genus in the Teinobasini sensu De Marmels (2007).

A revision of the mealybug genus Scaptococcus McKenzie (Hemiptera: Coccomorpha: Pseudococcidae), with descriptions of the adult male and female of Scaptococcus occultans sp. n. from the southwestern United States, and the male of S. milleri McKenzie.

The adult female and male of Scaptococcus occultans sp. n. (Hemiptera: Coccomorpha: Pseudococcidae), a new mealybug species from the southwestern United States, are described and illustrated, as well as the male of S. milleri McKenzie. Females of the new species can be recognized by their unmodified prothoracic legs, anal ring with two rows of cellular pores, and presence of a circulus; the adult female is further characterized by the presence of bands across the thoracic and abdominal segments containing numerous dorsal modified oral collar tubular ducts (with the inner half of the outer duct sclerotized), quinquelocular pores and multilocular pores. The adult male of the new species differs from that of S. milleri by having unmodified prothoracic femora, small spine-like prothoracic claw denticles, fewer dorsal and ventral setae on abdominal segments II-V, and no sclerotized abdominal tergites laterally on the abdomen. The generic description of Scaptococcus is revised to include the new species, and an updated key to the adult females, diagnostic notes for the female nymphal instars, and updated distribution and host data for all the three species are provided.

Identification of Nipaecoccus (Hemiptera: Coccomorpha: Pseudococcidae) species in the United States, with descriptions of Nipaecoccus bromelicola sp. n. and the male of N. floridensis Beardsley.

The adult female and male of Nipaecoccus bromelicola sp. n. are described, based on specimens on bromeliads in Californian nurseries and intercepted from Mexico and Guatemala, countries believed to be within the native range of this species. The male of N. floridensis Beardsley is also described, illustrated, and diagnosed from known congeners. An identification key to adult females of Nipaecoccus species recorded from the United States (including its overseas territories) is presented. Molecular characterizations based on COI are provided for N. bromelicola, N. floridensis, N. nipae and N. viridis.

Damselflies of the genus Argia of the Guiana Shield (Odonata: Coenagrionidae).

This revision of all 21 species of Argia known to occur within the Guiana Shield includes descriptions of new species, synonymies, keys to both sexes based primarily on morphology of caudal appendages and genital ligula in males and of the mesostigmal plates in females, diagnoses accompanied by illustrations and distribution maps for all species. Twelve new species are described: A. appendiculata (Holotype ♂: Venezuela, Amazonas State, Cerro de la Neblina, Base Camp, 0°50' N, 66°10' W, 18 ii 1985, P.J. & P.M. Spangler, R.A. Faitoute leg., in USNM), A. azurea (Holotype ♂: Guyana, Potaro-Siparuni Region, Kaieteur Ravine, about 5°10' N, 59°28' W, 11 iv 1912, J.M. Geddes leg., in UMMZ), A. cuneifera (Holotype ♂: Venezuela, Amazonas State, Cerro de la Neblina, Base Camp, 0°50' N, 66°10' W, 20-24 iii 1984, O.S. Flint, Jr. & J.A. Louton leg., in USNM), A. deceptor (Holotype ♂: French Guiana, Cayenne Department, Régina Commune, Saut Athanase, 4°10'59" N, 52°20'6" W, 9 x 2001, L. Juillerat leg, in MHNN), A. donnellyi (Holotype ♂: Venezuela, Bolívar State, small marsh and creek on plateau surface above Coñac River, 10 km E of El Paují; about 4°31' N, 61°31' W, 5 viii 1990, RWG leg., in CSCA), A. gemella (Holotype ♂: Brazil, Amazonas State, Reserva Ducke, 26 km E Manaus (3°0'15'' S, 59°56'23'' W, 120 m), 2-4 ii 1979, O.S. Flint Jr. leg., in USNM), A. guyanica (Holotype ♂: Venezuela, Amazonas State, Cerro de la Neblina, Camp IV, 0°58' N, 65°57' W, 15-18 iii 1984, O.S. Flint, Jr. leg., in USNM), A. joallynae (Holotype ♂: Venezuela, Bolívar State, Canaima, palm marsh, 6°14'30" N, 62°50'53" W, 22-25 ix 1980, R.W. & J.A. Garrison. leg., in CSCA), A. loutoni (Holotype ♂: Brazil, Amazonas State, Purus River, Nova Olinda, about 3°30' S, 57°56' W, 6 ii 1979, O.S. Flint, Jr. leg., in FSCA), A. meioura (Holotype ♂: Brazil, Amazonas State, Manaus, about 2°55' S, 59°59' W, 26 vi 1922, J.H. Williamson & J.W. Strohm leg., in UMMZ), A. palmata (Holotype ♂: Brazil, Amazonas State, Manaus, about 5 miles N of Flores on route to Campos Sales, small creek in virgin forest, about 3°0'S, 60°1' W, 15 vi 1922, J.H. Williamson & J.W. Strohm leg., in UMMZ), and A. recurvata (Holotype ♂: Venezuela, Amazonas State, San Carlos de Río Negro, 1°55' N, 67°4' W, 97 m, 14-21 iii 1984, J. De Marmels leg., in MIZA). The status of Argia impura Rambur, 1842, is discussed and the following nomenclatural changes are proposed: Argia stigmatica Navás, 1934 and A. umbriaca Fraser, 1946 are considered junior synonyms of Argia indicatrix Calvert, 1902, and Argia eliptica Selys, 1865 and A. icterica Navás, 1934 are considered junior synonyms of A. oculata Hagen in Selys, 1865.

A revision of Metaleptobasis Calvert (Odonata: Coenagrionidae) with seven synonymies and the description of eighteen new species from South America.

Examination of over 1,400 specimens of the neotropical genus Metaleptobasis Calvert, 1907, including primary types or paratypes of 18 of the 20 currently available species names and large series of specimens including pairs in tandem and copula, allowed me to unequivocally associate older names with species, distinguish between specific and intraspecific variability, associate both sexes for each species, and recognize the existence of female polymorphism. As a result, seven names are found to be junior synonyms: Metaleptobasis mauritia Williamson, 1915 junior synonym of M. bicornis (Selys, 1877), M. manicaria Williamson, 1915 and M. fernandezi Rácenis, 1955 junior synonyms of M. diceras (Selys, 1877), M. westfalli Cumming, 1954 junior synonym of M. foreli Ris, 1915, and M. tetragena Calvert, 1947, M. weibezahni Rácenis, 1955, and M. incisula De Marmels, 1989 junior synonyms of M. brysonima Williamson, 1915. Lectotypes are designated for M. amazonica and Leptobasis diceras. Eighteen new species of Metaleptobasis are described: M. brevicauda (Holotype ♂, Peru, Huánuco Dep., Shapajilla, jungle, 11 v 1939, F. Woytkowski leg., in UMMZ); M. falcifera (Holotype ♂, Peru, Madre De Dios Dep., Pakitza, Reserved Zone, Manu National Park, T2 to R2 to T1 to base camp, 11°55'48''S, 71°15'18''W, 250 m, 17 ix 1989, J.A. Louton leg., in USNM); M. furcifera (Holotype ♂, Peru, Loreto Dep., Iquitos, iii 1936, G.G. Klug leg., in BMNH); M. gabrielae (Holotype ♂, Peru, Loreto Dep., Tamshiyacu-Tahuayo Reserve, forest interior (4°23'40''S, 73°14'56''W), 27 vii 2009, T. Faasen leg., in RMNH); M. guillermoi (Holotype ♂, Peru, Loreto Dep., Yarinacocha, temporary forest stream (8°17'S, 74°37'W, 145 m), 2 vi 1972, D.L. Pearson leg., in FSCA); M. inermis (Holotype ♂, Brazil, Pará State, Jacareacanga, vii 1969, F.R. Barbosa leg., in UMMZ); M. leniloba (Holotype ♂, Peru, Loreto Dep., Pacaya-Samiria National Reserve, Santa Luisa trail (5°15'S, 74°40'W), 10 vi 2008, C. Beatty, A. Cordero & J. Hoffmann leg., in FSCA); M. longicauda (Holotype ♂, Brazil, Mato Grosso State, C. Teles Pires, Alto Tapajos, 1-31 viii 1956,  Sick leg., in MNRJ); M. orthogonia (Holotype ♂, Peru, Loreto Dep., San Juan, Río Amazonas, near Iquitos, viii 1939, J. Schunke leg., in FSCA); M. paludicola (Holotype ♂, Peru, Loreto Dep., Tamshiyacu-Tahuayo Reserve, swamp, 4°23'49''S, 73°14'57''W, 27 ii 2009, T. Faasen leg., in RMNH); M. panguanae (Holotype ♂, Peru, Huánuco Dep., Biological Station Panguana, E side Río Yuyapichis, 9°37'S, 74°57'W, 6-17 iv 2003, H.J. & E.-G. Burmeister leg., in ZSM); M. peltata (Holotype ♂, Peru Loreto Dep., Tamshiyacu-Tahuayo Reserve, 4°21'22''S, 73°11'0''W, 19 ii 2010, T. Faasen leg., in RMNH); M. prostrata (Holotype ♂, Peru, Junín Dep., Satipo, v 1945, P. Paprzycki leg., in UMMZ); M. silvicola (Holotype ♂, Peru, Madre de Dios Dep., Explorer's Inn on Río Tambopata, 30 km SW Puerto Maldonado, main trail, 1 viii 1979, M. Perkins & P. Donahue leg., in FSCA); M. spatulata (Holotype ♂, Peru, Huánuco Dep., 10 km N of Cucharas, confluence of Huallaga and Pacay rivers, viii 1954, F. Woytkowski leg., in UMMZ); M. tridentigera (Holotype ♂, Brazil, Rondônia State, Porto Velho, Area Abunan, T11 Aleatorio, 8°46'S, 63°54'W, 86 m, 16 v 2010, Nogueira & Mendes leg., in MZUSP); M. truncata (Holotype ♂, Brazil, Pará State, Jacareacanga, xi 1969, F.R. Barbosa leg., in UMMZ); and M. turbinata (Holotype ♂, Peru, Loreto Dep., Tamshiyacu-Tahuayo Reserve, forest swamp (4°24'18''S, 73°14'38''W), 25 ii 2010, T. Fassen leg., in RMNH). Illustrations, keys, diagnoses, and distribution maps for all 31 currently known species are provided. Phylogenetic relationships within the genus Metaleptobasis are analyzed based on 33 adult morphological characters, including the 31 currently described species of Metaleptobasis and eleven outgroup taxa of other Coenagrionidae of the subfamily Teinobasinae. The cladistic analysis recovered Metaleptobasis as monophyletic, and as sister group of Aceratobasis Kennedy, a teinobasine genus some of the species of which possess an articulated spur on base of male cercus. Hypothesized relationships among its species are discussed. 

Aeshna brasiliensis sp. nov. (Odonata: Aeshnidae) from South and Southeastern Brazil, with a Redescription of its Larva / Aeshna brasiliensis sp. nov. (Odonata: Aeshnidae) do Sul e Sudeste do Brasil, com Redescrição de sua Larva

Aeshna brasiliensis é descrita e ilustrada de 10 machos e 17 fêmeas do Sul e Sudeste do Brasil (holótipo-Rio Grande do Sul: Rio Tainha, 29°26'60" S 50°34'60" W, 900 m, MNRJ; alótipo- Rio de Janeiro: Itatiaia, Represa do Planalto de Itatiaia, 22°30'00" S 44°40'00" W, 2200 m, MNRJ; nove machos e 16 fêmeas parátipos). O último estádio larval é redescrito e caracteres diagnósticos são ilustrados. A. brasiliensis assemelha-se a A. variegata e A. peralta no padrão de cor da cabeça e abdome, porém difere delas no padrão de cor do tórax e forma dos cercos, e de A. variegata pela forma dos espinhos da lâmina anterior do macho, e de A. peralta por ser maior e pela forma dos cercos do macho. A larva se destaca por diferenciar-se de todas as outras congêneres conhecidas do Brasil pela ausência do espinho lateral no VI segmento do abdome.

Aeshna brasiliensis (holotype Rio Grande do Sul: Rio Tainha, 29º 26’60’’ S 50º 34’60’’ W, 900 m, MNRJ; allotype female Rio de Janeiro: Itatiaia, Represa do Planalto de Itatiaia, 22º 30’00"S 44º40’00"W, 2200 m, MNRJ; nine males and 16 female paratypes) is described and illustrated from 10 males and 17 females from southeastern Brazil. The last larval instar is redescribed and diagnostic characters are illustrated. A. brasiliensis resembles A. variegata and A. peralta in the color pattern of head and abdomen, but differs from them in the thoracic color pattern and shape of cerci, from A. variegata in the shape of anterior lamina spines, and from A. peralta by its larger size and shape of male cerci. The larvae uniquely differ from all the other known Brazilian congeners by lacking lateral spines on abdominal segment VI.