i\rr. W. L. Distant on llomoptera. 479 



convex to lateral margins, which are flat and at ri^ht angles 

 to disk; opcrcnla in male very small, situate widely a|)arr, 

 and not extending beyond base of abdomen ; anterior femora 

 spined beneath; rostrum reaching l)ase of posterior coxaj; 

 metasternum centrally elevated, the process posteriorly 

 triangularly produced between the posterior coxas ; tegmina 

 and wings hyaline, the first long, somewhat narrow, greatest 

 breadth not quite one third of length, venation normal, apical 

 areas eight, basal cell almost as broad as long. 

 Type, Q. yigas^ Oliv. {Cicada). 



Genus ]MURA. 

 Mura, Dist. Biol. Centr.-Amer., Rhyncli. Horn. i. p. 143 (1905). 

 Type, M, eleganhda^ Dist. 



Genus Hyantia. 

 • Hyantia, StSl, Hem. Afr. iv. p. 2 (1866). 

 Type, H, honesta, Walk. [Cydocliila). 



Division Tettigadesaria. 



Lateral margins of the pronotum dilated and usually 

 medially angulate ; head varying in breadth and size; 

 tympana completely exposed, the tympanal coverings entirely 

 absent; tegmina and wings either hyaline or semiopaque. 



This division is primarily founded on the character of the 

 dilated pronotal margins, and holds a similar position in the 

 Tibicininffi as the division Polyneuraria does in the Cicadina3 

 and the division Zammararia in tlie Gceaninte. 



Syiiopsis of Genera. 



A. Lateral margins of pronotum dilated and medially 

 angulate. 

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

 notum. 

 b. Space between pronotal dilatations less than width 

 of abdomen. 

 c. Basal cell of tegmina distinctly longer than 



broad ; tegmina and wings hyaline Collhia. 



hh. Space between pronotal dilatations considerably 

 wider than breadth of abdomen. 

 cc. Basal cell of tegmina slightly longer than broad ; 



tegmina and wings semiopaque Orapa. 



(ta. Head (including eyes) as wide as base of mesonotum. 

 bib. Space between pronotal dilatations equal to 

 greatest width of abdomen. 

 ccc. Basal cell of tegmina twice as long as broad . . Duza, 



