Agallia Curtis

C. A. Viraktamath, 2011, Revision of the Oriental and Australian Agalliini (Hemiptera: Cicadellidae: Megophthalminae) 2844, Zootaxa 2844, pp. 1-118 : 11

Genus Agallia Curtis

Agallia Curtis, 1833: 193 . Type-species: Agallia consobrina Curtis , by monotypy.

Morphology. Head wider than pronotum. Vertex short, of uniform length, posterior margin evenly curved ( Fig. 1). Face, vertex, pronotum and scutellum finely granulated. Face wider than long. Transclypeal suture complete ( Fig. 2). Distance between ocelli either as long as or longer than distance from adjacent eye. Pronotum rarely rugulose. Macropterous or brachypterous. Forewings with three anteapical cells, inner anteapical cell open or closed basally ( Figs 12, 15). Forefemora with arched row of intercalary setae (IC), AV without prominent setae ( Fig. 22). Hind tibial macrosetae PD 7±2, AD 6±1, AV 6±1. Hind basitarsus with one platella on distal transverse row.

Male genitalia. Pygofer caudally rounded and without processes ( Fig. 92). Subgenital plates slender, not fused, with macrosetae ( Fig. 93). Styles with inner arm longer than outer, with subapical tooth and apically narrowed ( Figs 98, 99). Connective short and about as broad as long. Aedeagus simple, symmetrical with well developed dorsal apodeme, preatrium poorly developed; shaft rarely with process, gonopore apical ( Figs 96, 97). Anal collar process often well developed ( Fig. 94).

Female genitalia. First pair of valvulae with well organised sculpturing, submarginal in median region, occupying less than half length of dorsal margin ( Figs 37, 38). Second pair of valvulae with toothed area occupying about half length of dorsal margin, teeth uniformly serrate, without denticles, ventroapical area crenulated ( Figs 39, 40).

Distribution. Predominantly Palaearctic genus but also distributed in northern limits of Afrotropical and Oriental regions.

Remarks. At present many unrelated species are placed in the genus Agallia by various authors. Nast (1972) included all Palaearctic species of Anaceratagllia in this genus. The genus is defined here in a restricted sense so as to make it more homogeneous. The Nearctic species of Agallia are not congeneric with the Palaearctic Agallia (Viraktamath 1980; Hamilton & Langor 1987). True Agallia from the Palaearctic region, for example Agallia consobrina ( Figs 12, 22, 37–40, 92–99) has the head of uniform length throughout the width; the male pygofer is simple without the caudal appendages; the anal collar is well developed with a simple claw-like caudal process and the main body of the collar has a few punctures; the aedeagus is symmetrical with a well-developed dorsal apodeme, rarely with a process, and lacking the preatrium. No species of Agallia were found from the Oriental region except an undescribed brachypterous female specimen from India (Jammu & Kashmir: Srinagar) ( Figs 1, 2, 562, 591). Agallia sinica Jacobi ( China) was not studied; however, by the original description, it does not appear to belong to the genus Agallia but to Anaceratagallia .