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The Neotropical genus Brincadorus Oman, 1938 is redescribed, and five new species are described and illustrated. Brincadorus cruceno sp. nov., from Bolivia and Peru, can be differentiated by the long and slender aedeagus, with a pre-apical dorsal spine and apex curved downwards. Brincadorus gracilis sp. nov., from Ecuador and Peru, can be distinguished by the slender subgenital plates, aedeagus with slender shaft and basidorsal processes without a preapical tooth. Brincadorus limoncocha sp. nov. from Ecuador, can be differentiated by the robust aedeagus shaft, and bifurcate basidorsal processes. Brincadorus quincemil sp. nov., from Peru, can be distinguished by the bifurcate apex of the subgenital plates, and aedeagus basidorsal process with a preapical dorsal tooth. Brincadorus yanayacu sp. nov., from Ecuador, can be distinguished by the thorn-like apex of the subgenital plates, and short aedeagus, without processes. A key to species is provided, and a female is illustrated and described for the first time. New records for Ecuador and Peru are provided. A new genus that shares similarities with Brincadorus is described. Saltadorus gen. nov. can be distinguished by the smaller size, male pygofer with a pair of long inner lateral processes arising sub-basally on the dorsal region and extending beyond the pygofer apex, widely separated and elongated subgenital plates, and robust aedeagus with a conspicuous sclerotized gonoduct protruding from the atrium. Saltadorus blahniki sp. nov., from Peru, can be identified by the elongated male pygofer, and aedeagus without processes. Saltadorus dietrichi sp. nov., from Peru, can be distinguished by the shorter male pygofer, and aedeagus with a pair of subapical dorsal teeth. Based on the results of recent phylogenomic analyses, Brincadorus is removed from Bahitini and, along with Saltadorus, is considered unplaced to tribe in Deltocephalinae, pending further study.

Leafhopper specimens of the genus Balclutha Kirkaldy, found in southern Florida (Palm Beach and Collier Counties), United States, beginning in 2020, and in shipments of plant products originating from Colombia and entering the United States beginning in 2019, are identified as B. jafara Webb. This species was previously known only from the Seychelles and Aldabra Islands, which are parts of the Seychelles archipelago in the Indian Ocean east of mainland Africa. Identifications were made by comparison with type specimens, both morphologically and through molecular analysis. Specimens in Palm Beach Co. were swept from commercial rice (Oryza sativa L.) paddies. Mitochondrial cytochrome c oxidase I (COI) barcodes of specimens from Florida and Colombia were closely matched to each other and to partial barcodes obtained from paratype specimens of B. jafara. The COI barcodes also closely matched sequences from previously unidentified Balclutha specimens in the Barcode of Life Data Systems (BOLD) from Kenya and South Africa, several of which were confirmed later morphologically as B. jafara. Previously unidentified museum specimens from South Sudan, Zambia, and Zimbabwe were determined as B. jafara. Together, these specimens show that B. jafara has a more widespread African distribution than was known previously, and that it arrived in the Western Hemisphere by 2019. Balclutha jafara is redescribed and illustrated. Further studies on the Balclutha fauna of Florida were performed. COI barcode data were generated for Floridian specimens of B. caldwelli Blocker, B. curvata Caldwell, B. flavescens (Baker), B. frontalis (Ferrari), B. incisa (Matsumura), and B. lucida (Butler). A phylogenetic analysis of COI data was conducted using publicly available sequences and those generated here. A key to the Balclutha species known from Florida is provided. The names that have been applied and mis-applied to Western Hemisphere species are discussed. To clarify the identity of some species, illustrations are given for: the female holotype and a male paratype of Eugnathodus virescens Osborn (=B. flavescens); the holotype of Nesosteles robustus Caldwell (=B. robusta); and the holotype of Balclutha curvata Caldwell. Additional barcoded specimens of Balclutha from Kenya and Pakistan were provided for examination by the BOLD research group and determined as B. sujawalensis Ahmed, previously known only from India and Pakistan, and this species is also illustrated here.

For the first time in the Palaearctic Region, the New World leafhopper genus Draeculacephala Ball (Hemiptera: Cicadellidae: Cicadellinae) has been recorded in France (Pyrenes-Orientales) and Spain (Catalonia). The species present in both countries is Draeculacephala robinsoni Hamilton 1967, among the most common and widespread species of the genus Draeculacephala in eastern North America. Comments on the identification of this species are presented. The species already seems to be firmly established in the region since it has been found in 11 different sites with a maximum distance of 86 km between them. Since the genus has been reported to be a vector of plant pathogens including Xylella fastidiosa its further spread in Europe should be closely monitored.

Papagona Ball, 1935 was originally described based on two species from the USA (Arizona). Both species of Papagona (P. papoosa Ball, 1935, type species of genus, and P. succinea Ball, 1935) are redescribed herein based on type specimens, including their previously unknown internal male genitalia. A new species from Brazil (Roraima) is described herein including the male and female terminalia. A taxonomic key to all included species is provided and additional diagnostic characters for this genus are proposed.

The taxonomy of the deltocephaline leafhopper tribe Faltalini (13 genera, 63 species) is revised. A key to all genera and keys to species for each genus are provided. All genera are described and at least one species of each genus is illustrated including images of the habitus, male and female genitalia, and scanning electron microscope (SEM) images of the head, face, and other characters. The new genera Dietrichana n.gen. [type species D. pampas n. sp.] and Paraclorindaia n.gen. [type species P. pinguis n. sp.] are described and the following 36 new species are described: Ackbaria jujuyensis n. sp. [Argentina], A. ojosverdes n. sp. [Argentina], Aequcephalus laplata n. sp. [Chile], Bonamus jussaral n. sp. [Brazil], Clorindaia obrienorum n. sp. [Uruguay], C. otamendi n. sp. [Argentina], Dietrichana pampas n. sp. [Argentina], Faltala catalanoae n. sp. [Argentina, Uruguay], F. paradellae n. sp. [Argentina], F. viscacha n. sp. [Argentina, Uruguay], Hecullus mexicanus n. sp. [Mexico], Kramerana saltensis n. sp. [Argentina], Paraclorindaia pinguis n. sp. [Argentina, Uruguay], P. vesperis n. sp. [Argentina], Tenucephalus admirabilis n. sp. [Argentina], T. bartletti n. sp. [Peru], T. brevilamina n. sp. [Argentina], T. cerrado n. sp. [Brazil], T. ecuadorensis n. sp. [Ecuador], T. flagellifer n. sp. [Peru], T. heppneri n. sp. [Peru], T. iguazu n. sp. [Argentina], T. interstinctus n. sp. [Peru], T. johnsoni n. sp. [Brazil], T. lingulatus n. sp. [Bolivia, Peru], T. manuensis n. sp. [Peru], T. misiones n. sp. [Argentina], T. musettiae n. sp. [Brazil], T. nielsoni n. sp. [Brazil], T. novafriburgo n. sp. [Brazil], T. parana n. sp. [Argentina], T. spectabilis n. sp. [Peru], T. takiyae n. sp. [Brazil, Peru], T. umbrinus n. sp. [Brazil], T. viperinus n. sp. [Argentina], and Virganana danasensis n. sp. [Ecuador]. The new combinations Paraclorindaia brasileira (Zahniser) n.comb. [transferred from Clorindaia] and Tenucephalus amabilis (Linnavuori Heller) n.comb. [transferred from Bonamus] are recognized. A phylogenetic analysis based on 51 morphological characters scored for 42 taxa including two outgroup taxa was performed. The resulting phylogeny resolved Faltalini as monophyletic, but the tribe remains difficult to diagnose because it encompasses a large amount of morphological diversity in characters traditionally used to define tribes of Deltocephalinae including head morphology, wing length and venation, and male genitalia. Despite this diversity, members of the tribe share the following characters: 1) phragma of male genital capsule partly developed into sclerotized plates or setose bulbous lobes (exception: Acrolithus); 2) first valvula shape relatively straight; 3) first valvula dorsal sculpturing separated from dorsal margin by unsculptured band; 4) first valvula dorsal sculpturing pattern maculose, with maculae separate or only slightly overlapping, or granulose; 5) first valvula with distinctly delimited ventral sculptured area; and 6) second valvula without dorsal teeth. Two major clades within the tribe were resolved and strongly supported, consisting of (Bonamus, Tenucephalus) and (Hecalocorica, (Hecullus, (Acrolithus, (Ackbaria, (Aequcephalus, Dietrichana, Virganana, Clorindaia, Faltala (Kramerana, Paraclorindaia)))))). A stepwise evolution of brachyptery in the latter clade is suggested by the phylogeny, beginning with evolution of subbrachypterous females in Hecullus and Acrolithus and culminating in completely brachypterous males and females in the monophyletic "Faltala group" of eight genera. It is hypothesized that a transition from an ancestral forested habitat to an open or grassland habitat facilitated the evolution of brachyptery. The hindwings and associated thoracic structures of eight species of Faltalini and three other Deltocephalinae were imaged with SEM. Brachyptery in Cicadellidae and other insects are briefly reviewed and discussed considering the hypothesis proposed here.

Tropical forests cover 7% of the earth's surface and hold 50% of known terrestrial arthropod species. Alarming insect declines resulting from human activities have recently been documented in temperate and tropical ecosystems worldwide, but reliable data from tropical forests remain sparse. The sap-sucking tribe Athysanini is one herbivore group sensitive to anthropogenic perturbation and the largest within the diverse insect family Cicadellidae distributed in America's tropical forests. To measure the possible effects of deforestation and related activities on leafhopper biodiversity, a survey of 143 historic collecting localities was conducted to determine whether species documented in the Mexican dry tropical forests during the 1920s to 1940s were still present. Biostatistical diversity analysis was performed to compare historical to recent data on species occurrences. A data matrix of 577 geographical records was analysed. In total, 374 Athysanini data records were included representing 115 species of 41 genera. Historically, species richness and diversity were higher than found in the recent survey, despite greater collecting effort in the latter. A strong trend in species decline was observed (-53%) over 75 years in this endangered seasonally dry ecosystem. Species completeness was dissimilar between historic and present data. Endemic taxa were significantly less important and represented in the 1920s-1940s species records. All localities surveyed in the dry tropical forest are disturbed and reduced by modern anthropogenic processes. Mexico harbours highly endemic leafhopper taxa with a large proportion of these inhabiting the dry forest. These findings provide important data for conservation decision making and modelling of distribution patterns of this threatened seasonally dry tropical ecosystem., (© 2021 The Authors.)

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 taxonomy of the leafhopper genus Makilingia Baker is reviewed based on comparative morphological study of types and other specimens. Twenty-six species are recognized as valid including ten new species described and illustrated herein: M. davaoensis n. sp. M. lobata n. sp., M. maculamima n. sp., M. nigramima n. sp., M. paranigra n. sp., M. siamensis n. sp., M. tenebrifrons n. sp., M. uncinata n. sp., M. viraktamathi n. sp., and M. xanthopicta n. sp. Makilingia siamensis n. sp. represents the first known occurrence of the genus outside the Philippine Archipelago and the first record for Thailand. Makilingia simillima Baker, n. stat., formerly treated as a variety of M. variabilis Baker, is elevated to full species status based on distinctive differences in the male genitalia. Lectotypes are designated for several species described by Baker. The male genitalia of these species are described and illustrated for the first time and a key to all known species is provided.

Linnavuori (1975) established the genus Clorindaia with the newly described species C. hecaloides Lv. designated as the type species of the genus. The genus currently includes five valid species, known from Brazil, Paraguay, and Argentina. C. hecaloides was described based on only one female specimen from Argentina, Formosa Prov., Clorinda. Linnavuori (1975) indicated that the holotype was deposited at the Museo de La Plata. However, extensive searches for the specimen at this institution and also at the American Museum of Natural History, at the Ohio State University Collection, and at US National Museum of Natural History have not recovered the specimen. Blocker Fang (1992) also reported unsuccessful searches for the holotype and for a parasitized female specimen collected in Chile, reported by Linnavuori DeLong (1977). Because the holotype appears to have been lost and because the description was based on a female which does not always provide unambiguous diagnosable characters at the species level in this group of leafhoppers, the identity of this species based on the original description unclear.

A new species Erasmoneura tricuspidata sp.n. and a new morphological variant of Erythridula stolata McAtee are described from the Great Smoky Mountains National Park.

A new tribe of the leafhopper subfamily Deltocephalinae, Punctulini tribe nov., from China, India, Thailand, and Fiji is described and includes three new genera and five new species: Punctulus gen. nov. includes P. tumidifrons sp. nov. from China, P. manipurensis from India, and P. lobatus sp. nov. from Thailand; Hirsutula gen. nov. includes H. rubrifrons sp. nov. from Thailand; and Taveunius gen. nov. includes T. megapunctatus sp. nov., from Fiji. A key to the genera of Punctulini is provided. Observations on the shared morphological characters of Punctulini with the superficially similar tribe Magnentiini, and with Vartini to which it is found to be related based on phylogenetic analyses of morphological and molecular data including newly available sequences and analyses, are made and discussed. Afrovarta Zahniser 2013 is removed from Vartini and placed in Athysanini, placement nov.

The new leafhopper genus, Duocrassana Pinedo-Escatel, Zahniser & Dietrich, gen. nov., and its type species, Duocrassana longula Pinedo-Escatel, Zahniser & Dietrich sp. nov., are described and illustrated based on material from Oaxaca, Mexico. The relationship with other genera in the tribe Athysanini is discussed, highlighting the importance of male genitalia for its identification.

A new genus and species of the leafhopper tribe Vartini are described.  Afrovarta angelae gen. & sp. nov. are described based on specimens from Ghana, Cameroon, and Gabon.