A new genus and four new species of Darnini (Hemiptera: Membracidae) from South America.

The new genus Polyodontotrochus is described and illustrated with four new species: P. auriculatus from French Guiana, P. elevatus (type species) from Ecuador, P. extentapalaestrus from French Guiana, and P. inpa from Brazil, the genus differs from all other membracids in having the inner sides of their metathoracic trochanters developed into apposed, sclerotized studlike, flattened plates distributed throughout. Their metathoracic tibiae have cucullate setal rows II and III incomplete, row I missing. A key to all species is provided.

Three new monobasic genera and three new species of the New World treehopper tribe Acutalini (Hemiptera, Membracidae, Smiliinae) with a key to all genera.

Three new genera in Acutalini are described, two of which have two discoidal cells (R2+3 and M) in the forewing, as in Euritea Stål. Ceresinoideazackigen. nov. et sp. nov., from Guatemala, differs from other acutalines in having a pair of suprahumeral spines and a stepwise convex pronotum in lateral view. Quinquespinosaseptamaculagen. nov. et sp. nov., which is widely distributed in South America, differs in having a basal cell M and three posterior pronotal spines. Tectiformaguayasensisgen. nov. et sp. nov., from Ecuador, has the pronotum strongly tectiform throughout. A key to all genera of Acutalini is provided.

Three new species of the Neotropical genus Smilidarnis Andrade (Hemiptera, Membracidae).

Smilidarnisduocornussp. nov., S.erwinisp. nov., and S.robustussp. nov. are described, illustrated, and included in a key to the five species here recognized in Smilidarnis. One member of this genus, from Ecuador (new country record for genus), is S.erwini, which differs from its congeners in having distinct coloration and being of intermediate size in terms of overall body length and the relative length of the lateral apical spines. Smilidarnisrobustus (from Peru) and S.duocornus (from Brazil) differ from the other species of Smilidarnis in having the pronotum bearing a pair of suprahumeral spines.

The immatures of the New World treehopper tribes Acutalini Fowler and Micrutalini Haupt (Hemiptera, Membracidae, Smiliinae).

The nymphs of Acutalis Fairmaire, Bordoniana Sakakibara, Thrasymedes Kirkaldy, and Micrutalis Fowler are described and illustrated (Bordoniana and Thrasymedes for the first time). The nymphs of all four genera are exceedingly cryptic. The nymphs of some species lack scoli on the head and pronotum but all have paired scoli on the meso- and metathoracic nota and abdominal segments III-IX. Some species also have lateral rows of enlarged chalazae on the abdomen, and even large scoli ventrolaterally-the latter condition is unique within Smiliinae. The eggs are deposited in stems (not in exposed masses) and nymphs are solitary and not ant-attended. The fifth instar nymphs of Micrutalini range in length from 3.0-3.5 mm, much smaller than the fifth instars of most other treehoppers.

Redescription of Pseudophera heveli Kramer (Hemiptera, Cicadellidae) with the first description of the female.

Pseudophera heveli Kramer is redescribed from Monteverde, Costa Rica. The female is described for the first time. Fifteen images of the species are provided, including genitalia.

Description of a new, unusual species of Diestostemma Amyot & Serville (Hemiptera, Cicadellidae) from Ecuador.

Diestostemma bicristata sp. nov., is described from Napo Province, Ecuador. It is unusual for the genus in lacking a visible white powdery covering, having raised, weakly reticulate veins on the forewing, a short metathoracic femur (half length of the metathoracic tibia), and is the only species with a double-crested pronotum.

The Chinese Hecalina (Hemiptera: Cicadellidae: Deltocephalinae: Hecalini) with descriptions of a new genus and seven new species.

The Chinese Hecalina (Deltocephalinae: Hecalini), which consists of five genera, is reviewed. Coloration and shape of the head and body, venation of forewing, and genitalia structures are the main morpological characters utilized to distinguish taxa. Fangamanus gen. n. is proposed for Parabolocratus tripunctatus Matsumura (type species of the new genus) and two other species. A key to the five genera of the Chinese Hecalina (Fangamanus gen. n., Hecalus Stål, Hecalusina He et al., Linnavuoriella Evans, and Thomsonia Signoret) is given, and seven new species from China are described: Hecalus changjiaotus, H. feithailandus, H. nadanus, H. triundosus, H. yuanmouensis, Thomsonia breviaea, and T. daliensis. In addition, four new combinations are proposed: Thomsonia nitobei (Matsumura), Fangamanus rufofascianus (Li), F. tripunctatus (Matsumura) (n. rec.), and F. morrisoni (Kwon and Lee). Only seven previously described species from China remain in Hecalus Stål: H. bifurcatus Cai Wang, H. furcatus Morrison, H. henanus Cai Shen, H. katoi Metcalf, H. prasinus (Matsumura), H. thailandensis Morrison, and H. wallengreni (Stål) plus two species (H. paykulli Stål and H. lefroyi Distant) previously recorded but unconfirmed here from China. Four species are redescribed: Fangamanus rufofascianus, F. tripunctatus, Thomsonia porrecta, and the first description and illustration of the male of T. nitobei (Matsumura) are provided.

The identity of three South American "smiliine" treehoppers (Hemiptera, Membracidae) and related taxonomic changes, including description of a new genus in Thuridini.

Based on examination of holotypes or interpretation of original descriptions, four taxonomic changes are proposed for South American species erroneously placed in the tribe Smiliini: Flynnia, gen. n. (Thuridini) and F. fascipennis (Funkhouser), comb. n. from Bolivia; Antianthe atromarginata (Goding), comb. n. from Ecuador; Amastris pilosa (Funkhouser), comb. n. from Peru; and Thelia planeflava Fairmaire from Brazil to Polyglyptini incertae sedis, new placement.

The Distribution of Cicadellinae Leafhoppers and Other Auchenorrhyncha on Coffee and Citrus in Puerto Rico.

Key words: : Caribovia coffeacola, Cicadellinae, coffee, Xylella fastidiosa.

A new species of the endemic Chilean leafhopper genus Chileanoscopus (Hemiptera: Cicadellidae: Idiocerinae).

A new species, C. serrulatus sp. nov. is described and illustrated from Chile. A redescription of this genus is provided together with a key to species for males.

Taxonomic revision of the Malaysian Idiocerinae (Hemiptera: Cicadellidae), with description of new taxa.

The leafhopper subfamily Idiocerinae is revised for Malaysia. Thirteen genera and 17 species are recognized including 1 new genus, Serridiocerus n. gen., 2 new species, Serridiocerus membranaceus n. sp. and Burmascopus longidens n. sp., 3 newly recorded genera and 2 newly recorded species: Burmascopus n. rec., Chunra n. rec., Philipposcopus n. rec., Chunra australis n. rec., Philipposcopus maquilingensis n. rec.. A checklist and a key to species of Malaysian Idiocerinae are also provided.

Redescription of the Philippine leafhopper genus Iposcopus Baker (Hemiptera: Cicadellidae: Idiocerinae).

The Philippine leafhopper genus Iposcopus Baker is redescribed. The male and female genitalia of I. breviceps and I. distanti are described and illustrated for the first time.        Baker (1915) established the genus Iposcopus and included two new species, I. breviceps and I. distanti (the type species) from the Philippines. Previously, only the external morphology and color have been described, not the genitalia. Here we first give a more complete description of the species, including male and female genitalia.

A new species of Eutettix (Hemiptera, Cicadellidae, Deltocephalinae) from Wisconsin.

Eutettix latoides sp. n., is described from central Wisconsin. It most closely resembles the Californian species Eutettix latus Hepner, and was collected from Quercus ellipsoidalis.

First Immature of the New World Treehopper tribe Thuridini (Hemiptera, Membracidae, Smiliinae) with a new synonym, a new combination, and a new country record.

The species Thuris depressus Sakakibara (1975) is proposed as a syn. n. of Thuris binodosus (Goding 1926), comb. n. The distribution of the genus is expanded from Brazil and Peru to include Ecuador and Venezuela, and the immature is described based on 75 characters.

Immatures of the New World treehopper tribe Amastrini (Hemiptera, Membracidae, Smiliinae) with a key to genera.

The immatures stages of 8 of the 11 genera (Amastris Stål, Bajulata Ball, Erosne Stål, Harmonides Kirkaldy, Idioderma Van Duzee, Neotynelia Creão-Duarte & Sakakibara, Tynelia Stål, and Vanduzea Goding) of the tribe Amastrini are described for the first time along with brief diagnoses of Membracidae and the subfamily Smiliinae. A key to genera and notes on biology are provided. Multiple species of most genera are illustrated. Based on its distinct nymphal morphology, Vanduzea laeta nolina Ball is elevated to specific rank as Vanduzea nolina stat. n., and Bajulata, despite the superficial similarity of its adults to those of Vanduzea, is confirmed as warranting generic rank based on its unique nymphal morphology. Colombia is a new country record for Tynelia.

Nomenclatural changes in Cicadellidae: Typhlocybinae and Delphacidae (Homoptera).

New replacement names are proposed for seven species of the subfamily Typhlocybinae; one new synonym is recognized in the family Delphacidae. The following changes are proposed: Empoasca (Empoasca) angustata nom.nov. for Empoasca angusta Linnavuori & DeLong (not Dworakowska); Empoasca (Empoasca) chilensis nom.nov. for Empoasca diversa Linnavuori & DeLong (not Vilbaste); Austroasca verdensis nom.nov. for Empoasca artemisiae Lindberg (not Lethierry); Kropka vidanoi Dworakowska for Erythroneura unipunctata Dlabola (not Cerutti); Zyginella vietnamica nom. nov. for Zyginella melichari Dworakowska (not Kirkaldy); Eupteryx (Eupteryx) dlabolai nom. nov. for Eupteryx octonotata Dlabola (not Hardy); Baaora ahmedi nom. nov. for Baaora spinosa (Ahmed) (not Beamer); Paradelphacodes insolitus Dmitriev is synonymized with Paradelphacodes gvosdevi (Mitjaev), syn. nov.

Immature Stages and Hosts of Two Plesiomorphic, Antillean Genera of Membracidae (Hemiptera) and a new species of Antillotolania from Puerto Rico.

The nymphs of Antillotolania Ramos and Deiroderes Ramos are described for the first time, along with the first host record for the genus Antillotolania, represented by Antillotolania myricae, sp. n. Nymphal features of both genera, such as a ventrally fused, cylindrical tergum IX (anal tube), the presence of abdominal lamellae, and heads with foliaceous ventrolateral lobes confirm their placement in Membracidae and are consistent with phylogenetic analyses placing them in Stegaspidinae but in conflict with a cladistic analysis showing a closer relationship to Nicomiinae. Head processes and emarginate forewing pads in the last instars of both genera support an earlier estimate, based on nuclear genes, that the two genera form a monophyletic group in Stegaspidinae. Distinguishing features of the four species of Antillotolania are tabulated.