Evacanthus Le Peletier & Serville

Viraktamath, C. A. & Webb, M. D., 2018, Revision of the evacanthine leafhoppers (Hemiptera: Cicadellidae: Evacanthinae) of the Indian subcontinent, Zootaxa 4386 (1), pp. 1-78 : 15-16

Evacanthus Le Peletier & Serville

Evacanthus Le Peletier & Serville 1825: 612 . Type species: Evacanthus interruptus Le Peletier & Serville , type by original designation.

Euacanthus Burmeister 1835: 116. Type species: Cicada acuminata Fabricius , type by subsequent designation of Desmarest 1849: 475.

Stramineous or yellow and black or fuscous.

Macropterous or subbrachypterous, robust leafhoppers. Head, thorax and forewings sparsely pubescent. Head either as wide as or wider than or narrower than pronotum. Crown with submarginal carina and median longitudinal carina not meeting submarginal carina. Ocelli close to anterior margin with carina on mesal margin that joins submarginal carina, surface of crown smooth, usually polished. Face swollen, smooth. Frontoclypeus with median carina not reaching dorsal margin of face, sometimes with depressions on either side of carina, with prominent oblique ridges indicating muscle impressions. Clypellus medially swollen and broad, ridge-like. Lora with median longitudinal depression. Pronotum transversely rugose, with transverse depression of various magnitudes (in E. repexus very shallow; in E. militaris very deep and traversing entire width of pronotum). Forewings with well developed appendix, overlapping beyond clavus, outer anteapical cell small or absent, apical cells short. Forefemur macrosetae row AV with hair-like setae and 4 setae in midlength slightly enlarged, AM1 well developed, others in this row scattered, intercalary row poorly differentiated from row AM. Hind femur distal macrosetae 2+2+1. Hind tibial macrosetae on row AD 9–11, PD 19–21, AV 17–18. Row AD with three slightly longer setae between two major setae. Hind basitarsus with five platellae on distal transverse row ( Fig. 9 C ).

Male pygofer with basal fracture and well separated lobe, with ventral spine-like process sometimes slightly exceeding dorsal margin. Valve not fused with dorsal wall of pygofer. Subgenital plates basally with short segment and setae. Style short and stout, lateral lobe present, with foot-shaped apex of apophysis, heel well developed, toe elongate and pointed. Connective Y-shaped, stem as long as arms or longer. Aedeagus with variously developed dorsolateral lobes with processes, shaft often grooved on its ventral or posterior margin and with short apical or subapical processes.

Female with first pair of valvulae slightly curved, sculptured area occupying about half length. Second pair of valvulae, slightly curved dorsally, toothed area occupying about 0.4 distal length, teeth well separated, without secondary dentition.

Remarks. Evacanthus can be readily recognized from all other evacanthine genera of the Indian subcontinent by the frontal carina not reaching the apex of the face and the hind basitarsus with platellae instead of stout setae distally. Rao (1990) provided a preliminary key to the species of the Indian Evacanthus .

Figures

FIGURES 9 A–J. Metatarsi and female terminal segments in Evacanthini.A–E. Chaetotaxy of first and second metatarsi: A. Bundera acutivertex sp. nov.; B. Cunedda phaeops; C. Evacanthus convolutes sp. nov.; D. Onukindia connecxa; E. Risefronta albicincta. F–J. Female terminal sternites: F. Apphia himlayana, ventral view ovipositor; G. Bundera venata, pregenital sternites; H. Apphia burmanica, seventh sternite; I. Vangama steneosaura, seventh sternite; J. Mainda praeculta, seventh sternite.