38 GUIDE TO ORTHOPTERA 



species ranges across the continent near the northern boundary of 

 the United States ; Leprus with two species occurs in California, 

 Texas and Colorado ; Tomonotus with two species in Texas ; 

 Anconia and Heliastus, with two or three species each, in Cali- 

 fornia, Arizona, southern Utah and New Mexico. The other 

 genera, with from one to four species each but ordinarily with 

 only one or two, are confined to the high plateau region of the 

 western Cordilleras. Nearly half of our genera occur also in 

 Mexico, often with more numerous species. Other uncharacter- 

 ized genera also occur in our territory. 



Eremobiini. 



Three only out of the fourteen known genera of this tribe 

 occur in the United States, and only one of these is peculiar to it. 



Genera of JEremobiim. 

 a ^ Body stout but subcylindric, more compressed than depressed, 

 normal or subnormal ; hind femora normally elongate, much more 

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

 b ^ Intraocular space more than twice the breadth of the eyes 

 as seen from above ; jjronotum rather gently narrowing from 

 behind forward, sharply carinate, posteriorly truncate, the lat- 

 eral lobes rapidly and greatly narrowing inferiorly ; tegmina 

 lobiform, lateral ; wings rudimentary ; hind legs excessively 

 stout, the femora scarcely compressed ; arolia very large. 



Brachystola Scudder. 

 b ^. Intraocular space narrower than the width of the eyes as 

 seen from above ; pronotum rapidly narrowing from behind for- 

 ward, feebly carinulate, with blunt lateral rugae, the lateral lobes 

 subequal in width throughout ; tegmina and wings fully devel- 

 oped ; hind legs normal ; arolia minute. Tytthotyle Scudder. 

 a ^. Body gross, short, subfusiform, more depressed than com- 

 pressed ; hind femora exceptionally broad and only half as long 

 as the body, compressed, above tuberculate and laminato-carinate. 



Haldemanella Saussure. 

 These genera are western and particularly southwestern, and 

 have one or two species each, in our territory. 



