302 Mr. W. L. Distant on Horaoptera. 



B. Pronotum moderately broad, its breadth considerably less 

 than length of both pro- and mesonotuni (including the 

 cruciform basal elevation). 

 b. Head between eyes much narrower than base of meso- 

 notuni Arunta. 



Genus Thopha. 

 Thopha, Amy. & Serv. Hist. Hem. p. 471 (1843). 

 Type, T. saccata, Fabr. [Tettigonia), 



Aeunta, gen. no v. 



Head transverse, moderately truncate in front of eyes, 

 between eyes much narrower than base of mesonotum ; 

 rostrum reaching the posterior coxae ; pronotum moderately 

 broad, its breadth considerably less than length of both pro- 

 and mesonotum (including the basal cruciform elevation) ; 

 tympana very largely developed and sac-like, their apices 

 obliquely extending beyond the lateral margins of the abdo- 

 men and to about half its length ; opercula very small, not 

 extending to base of metasternum, placed wide apart, and 

 with their apical margins convex ; anterior femora incras- 

 sated and spined; posterior tibiae with a few lateral fine 

 spines ; tegmina and wings talc-like, tegmina with eight 

 apical areas. 



Type, A. perulata^ Gu^r. ( Cicada) . 



Division Cyclochilaria. 



Abdomen broad, unsymmetrical, medially widened and 

 distinctly abbreviated posteriorly, in the male sex (princi- 

 pally) obliquely depressed on each side, its greatest width 

 almost double that of head between eyes ; opercula not 

 extending beyond base of metasternum. 



Synopsis of Genera. 



A. Lateral margins of pronotum moderately concavely 



ampliated ; head (including eyes) almost as wide 

 as anterior margin of pronotum ; abdomen beneath 

 moderately convex Cyclochila. 



B. Lateral margins of pronotum not convexly ampliated, 



but considerably narrowed anteriorly ; head (in- 

 cluding eyes) wider than anterior margin of pro- 

 notum ; abdomen beneath more or less obliquely 

 depressed from base to apex. 

 a. Head (including eyes) broader than base of meso- 

 notum ; abdomen considerably longer than broad. Psaltoda. 

 h. Head (including eyes) only about as broad as base 

 of mesonotum ; abdomen about as broad as 

 long Hcnicopsaltria. 



