AEPHIA. 119 



than half as long as the body, above smooth, simply 



carinate. 

 c. Interocular space more than twice the breadth of the eyes as 

 seen from above ; pronotum rather gently narrowing from 

 behind forward, sharply carinate, posteriorly truncate or 

 roundly angulate, the lateral lobes rapidly and greatly nar- 

 rowing inferiorly ; tegmina lobiform, lateral ; wings rudi- 

 mentary ; hind legs excessively stout, the femora scarcely 



compressed, arolia very large Brachystola, Scudd. 



cc. Interocular space narrower than the width of the eyes as seen 

 from above ; pronotum rapidly narrowing from behind 

 forward, fully carinulate, with blunt lateral rugae, the lateral 

 lobes subequal in width throughout; tegmina and wings 



fully developed ; hind legs normal, arolia minute .... Tytthotyle, Scudd. 

 bb. Body gross, short, subfusiform, more depressed than compressed ; 



hind femora exceptionally broad and only half as long as the H aldemanella, Sauss. 



body, compressed, above tuberculate and laminato-carinate . . |p HRYN0TBTTIX ^ Uhler. 



ARPHIA, Stal. 



CEdipoda, Latr. (in part.). 



Tomonotus, Sauss. (in part.), Rev. et Mag. Zool. xiii. p. 319 (1861). 



Arphia, Stal, Recens. Orthopt. i. p. 113 (1873). 



The genus Arphia is confined to North America, where some of its representatives 

 may be found in almost every region. It is not surprising therefore that upwards of 

 two dozen species have been characterized already, and still others are now added. 

 While a few of the forms occur in districts widely removed from the country covered 

 by the present work, the majority of the known representatives of the genus must be 

 regarded as belonging to the Mexican or Central-American fauna. Since no attempt 

 has hitherto been made at monographing the group, it is thought best to give the 

 space for such a treatment of the genus here. It is but natural that some of the 

 species belonging to a genus like the present, with such a multitude of forms, should 

 be very closely related. Hence their differences are sometimes difficult to satisfactorily 

 indicate or describe in a brief synoptic table like the following. 



Table for separating the Species of Arphia. 



A. Frontal costa with its sides subparallel, not sulcate, punctate or 



subcarinate, or above bifoveolate, broadly truncate at the vertex 



or continuous with the scutellum of the vertex. Median carina 



of the pronotum variable. 



b. Pronotal crest greatly elevated, arcuate, not or faintly intersected 



by the principal sulcus. Pronotum strongly angulate in front, 



