34 M. W. NIELSON 



Paratypes. New Guinea: allotype $, same data as holotype (BPBM, Honolulu); 

 6 <J, same data as holotype; Vogelkop, Bombed, 700-900 m, 4 3, 1 $, 4-7. v. 1959 

 (T. C. Mad); Fak Fak, S. coast of Bomberi, 100-700 m, 1 2, 4. v. 1959 (7\ C. Maa); 

 Ifar, Cyclops Mts, 300-500 m, 1 $, 23-25. vi.1962 (/. Sedlacek) (BPBM, Honolulu); 

 1 $, same data as holotype (USNM, Washington) ; Vogelkop, Bomberi, 700-900 m, 

 1 <$, 6.vi.i959 (T. C. Maa) (BMNH, London); 1 $, same data as holotype; Vogelkop, 

 Bomberi, 700-900 m, 1 <$, 1 $, 6.VL1959 (7\ C. Maa), in author's collection. 



Biology. Information on data labels indicates that this species is prevalent 

 from June to August at elevations ranging from 100 to 900 metres. No host or 

 other biological information is known. 



Remarks. The species ventrospicidata is the only known member of the genus, 

 which can be separated generically from Tharra, its nearest relative, by the single- 

 appendaged aedeagus. 



Genus THARRA Kirkaldy 



(Text-figs 73-509) 



Tharra Kirkaldy, 1906 : 324. Type-species: Tharra labena Kirkaldy, by original designation 



and monotypy (Kirkaldy, 1906 : 324). 

 Muirella Kirkaldy, 1907 : 79. Type-species: Muirella oxyomma Kirkaldy, by original 



designation and monotypy (Kirkaldy, 1907 : 79). Syn. n. 

 Jassoidula Osborn, 1934a : 182. Type species: Jassoidula straminea Osborn, by original 



designation (Osborn, 1934a : 182). Syn. n. 

 Nisitra Walker, 1870 : 327. Type-species: Nisitra lelifera Walker [= Tharra tiarata (Stal)J, 



by original designation and monotypy (Walker, 1870 : 327). [Homonym of Nisitra Walker, 



1869 (Metcalf, 1952 : 229).] Syn. n. 

 Nisitrana Metcalf, 1952 : 229. [Replacement name for Nisitra Walker 1870.] Syn. n. 



Small to medium size elongate leafhoppers. 



Colour variable from general fuscous to general pale yellow, frequently marked. Sexual 

 dimorphism evident in many species with coloration highly marked in females, nondescript 

 in males. 



Head variable in form, narrower than pronotum; crown produced considerably beyond to 

 nearly even with anterior margin of eyes, lateral margins parallel or convergent, strongly 

 carinate or not, disk even to or elevated above eyes, often depressed medially or on each side 

 of middle, surface striate radially from apex; ocelli near anterior margin of crown, size and 

 position variable interspecifically; eyes medium size, occupying little over half to less than 

 half of total dorsal area of head; pronotum with median length about equal to median length 

 of head except in long headed species, lateral carina dorsad of costal margin of elytra; scutellum 

 large, median length greater than median length of pronotum; elytra long, narrow basally, 

 expanded apically, appendix well developed, size variable interspecifically, venation obscure 

 to prominent; hind wings well developed; clypeus long, broad anteriorly, narrowed posteriorly, 

 usually constricted medially, median longitudinal carina usually absent, present in a few 

 species, sometimes partially complete in both sexes or in female only, surface finely granulose, 

 several to many rugulose striations along anterior margin below crown; clypellus long, lateral 

 margins parallel or expanded apically, flat to swollen longitudinally. 



Male genitalia symmetrical, well developed; pygofer broad dorsoventrally with a conspicuous 

 process arising from middle of caudal margin or caudoventrally, process variable in size, length, 

 and form interspecifically, sometimes with accessory processes; aedeagus bipendulate with 

 fusion basally, articulated basally to apex of connective; dorsal appendage broad, often with 



