310 ^Ir. W, L. Distant on llomoptcra. 



Genus Calcagxixus. 

 Calcagninus, Dist. Mon. Orient. Cicad. pp. 31 & 136 (1889). 

 Type, C. 2)i'ctura(uSj Dist. (^Leptopsaltria) . 



Division F I D I C I N A R I A. 



This division is represented by a series of Neotropical 

 genera, in all of wliicli the t3-m[)anal orilices are more or less 

 exposed ; the tymi)anal flaps are always well developed and 

 are usually somewhat angulate at their apices ; the tegniina 

 and wings are hyaline, sometimes maculate, but never 

 opaque, they always possess eight apical areas; the lateral 

 margins of the pronotum have sometimes their posterior 

 angles lobately produced, but they are never convexly 

 ampliate nor medially angulate. 



Synopsis of Ge.yiera. 



1. Metasternum with a moderately elevated transverse 

 central plate, which is not anteriorly angularly 

 produced. 



A. Head (including eyes) about equal in width to 



base of niesouotum ; eyes scarcely projecting 

 beyond anterior angles ofpronotuni, 

 a. Vertex of head at area of ocelli distinctly longer 

 than front. 

 h. Posterior angles of pronotum a little promi- 

 nent, but not lobately produced. 

 c. Tegniina with transverse vein at base of 



second apical area more or less vertical . Proarna, 

 aa. Vertex of liead at area of ocelli often only 

 very slightly longer than front. 

 cc. Tegmina with transverse vein at base of 



second apical area strough* oblique Tympanoterpes. 



B. Head (including eyes) considerably broader than 



base of niesonotum ; eyes projecting beyond 

 anterior angles of pronotum. 

 hb. Posterior angles of pronotum more or less 

 lobately produced. 

 d. Tympanal coverings large and only mode- 

 rately internally deficient. 

 e. Tegmina with transverse vein at base of 

 second apical area more or less vertical. 

 f. Vertex of head at area of ocelli about 



as long as front OUattta. 



ff. Vertex of head at area of ocelli much 



longer than front Pacarmit. 



del. Tympanal coverings only developed on 

 lateral areas. 

 ee. Tegmina with transverse vein at base of 



second apical area strongly oblique .... Ariasa. 



