]\Ir. W. L. Distant on ITomopteva. 481 



absent ; abdomen beneath witli the disk moderately convex, 

 tlie lateral margins distinct and slightly oblique ; opercula in 

 male small, transverse, well separated internally, not ex- 

 tending beyond base of abdomen, between them there is a 

 flat, transverse, metasternal process ; disk of metasternum 

 elevated, posteriorly triangularly produced between the 

 posterior coxae ; rostrum reaching the posterior coxa3 ; ante- 

 rior femora s))incd beneath ; tegmina and wings hyaline, 

 venation normal, basal cell of tegmina mucli longer than 

 broad. 



Type, D. mo7itezuma, Walk. {Zammara). 



Genus Tettigades. 



Tdtiyades, Amy. & Serv. Hist. lUm. p. 469 (1843). 

 Type, T. chilensis, Amy. & Serv. 



ChoNOSIA, gen. nov. 



Head (including eyes) much wider than base of mesonotum, 

 its lateral margins obliquely sinuate, the front strongly pro- 

 jecting and longer than vertex at area of ocelli j pronotum 

 only sliglitly longer than head, its lateral margins dihated but 

 not angulate, posteriorly oblique; abdomen short, not quite 

 so long as space between apex of head and base of cruciform 

 elevation ; tympana completely exposed, tympanal coverings 

 entirely absent ; opercula in male moderately well developed, 

 but not extending beyond the basal segment of abdomen ; 

 anterior femora spined beneath ; tegm.ina and wings semi- 

 hyaline, tegmina more than twice as broad as long; venation 

 similar to that in genus Tettigades. 



Type, C. crassipennisj Walk. {Fidicina). 



Division H u E c H Y s A R i A. 



Tegmina and wings opaque or semiopaque ; lateral margins 

 of the pronotum neither ampliate nor dentate ; abdomen 

 moderately robust, but not transverse, longer than space 

 between apex of head and base of cruciform elevation ; 

 tympana completely exposed, tympanal coverings entirely 

 absent; tegmina with the ajiical areas variable in number, 

 either eight or ten, or variably fluctuating between those 

 numbers. 



Synojjsis of Genera. 



A. Head with the face longitudinally sulcata. 



a. Head (including eyes) not no wide as base of meso- 

 notum. 



