30 PROCEEDINGS OP THE AMERICAN ACADEMY. 



P. Hind femora of $ less than twice as 

 long as fore femora, 



l^. Hind tibiffi of $ no longer than 

 femora ; spurs only a little longer than 

 tibial depth, and divaricating about 60° ; 

 inner carina of fore femora minutely ser- 

 ratulate .... 50. californianus. 

 P. Hind tibia; of c? a little longer than 

 femora ; spurs fully twice as long as tibial 

 depth, and divaricating about 90° ; inner 

 carina of fore femora simply spined. 



49. testaceus. 



¥■. Hind femora of $ two and a fourth times 



as long as fore femora . . 29. neglectus. 



j^. Ovipositor relatively long, two thirds as 



long as hind femora or more. 



F. Hind femora of $ relatively slender, 

 at least three times as long as broad. 



l^. Hind tibiae of $ of same length as 

 femora ; colors moderately dark. 



37. alpinus. 

 P. Hind tibia? of ^ considerably longer 

 than femora ; colors rather pallid. 



41. pallescens. 

 P. Hind femora of ^ relatively stout, 

 hardly more than two and a half times as 



long as broad 43. crassus. 



c^. Dorsal surface of abdomen of ^ closely tuberculate ; hind 

 tibia? strongly arcuate. 



d^. Both outer and inner caringe of hind femora of ^ armed 

 with a large compressed spine as long as the depth of the 



genicular lobes 52. pacijicus. 



d'^. Outer carina of hind femora of ^ elevated to a high 

 lamina, suddenly terminating acutely before the genicular 



lobes 53. henshawi. 



a^. Second joint of hind tarsi but little longer than the third. 



v. Large species ; outer carina of hind femora considerably and 



uniformly elevated throughout 54. devius. 



6^. Small species ; outer carina of hind femora elevated distally 



much more than proximally 55. neomexicanus. 



The male being unknown to me, C, sylvestris does not appear in the 

 above table. It will be foun<l below as No. 41. 



