26 PROCEEDINGS OF THE AMERICAN ACADEMY. 



p. Hind femora less than three times as long 



as broad 13. terrestris. 



j'^. Hind femora three and a half times as 



long as broad 14. celatus. 



i^. Hind tibiae considerably longer than tlie 

 femora, the spurs half as long again as the tibial 

 depth, the hind femora only about twice as long 



as the fore femora 15. brevipes. 



g^. Fore femora of ^ nearly one half longer than 

 the pronotum ; outer carina of hind femora of male 



spined, not serrulate 16. lapidicola. 



f^. The lighter colors which are more massive prevail 

 above, the darker appearing principally as posterior 

 bands to the segments and rarely darker than fusco- 

 castaneous, rarely vfith a light mediodorsal line. 



g^. Outer carina of hind femora of ^ armed with 

 only a few raised points. 



Ji^. Hind femora slender, nearly three and a half 

 times longer than broad . . . 17. arizoiiensis. 

 h"^. Hind femora stout, about two and a half times 



longer than broad 18. uniformis. 



d'^. Hind tibi£8 of $ arcuate or sinuous; outer carina of 

 hind femora of ^ always conspicuously spined. 



e^. Hind femora very long, four times as long as broad, 

 the fore femora fully three fourths as long again as the 



pronotum 19. heros. 



e^. Hind femora relatively short, not more than three and 

 a half times longer than broad, the fore femora consider- 

 ably less than half as long again as the pronotum. 

 f^. Inferior sulcus of hind femora of $ broadening 



proximally 20. uhleri. 



f^. Inferior sulcus of hind femora of ^ of uniform 



width 21. hlatddeyi. 



h^. Fore femora but little if any longer than the pronotum even 

 in the male ; hind tibiaj of male usually straight, but often bowed 

 or sinuate. 



c^. Dorsal surface of abdomen of $ smooth and even. 

 d^. Hind tibiae of $ arcuate or sinuate in basal half. 



e^. Hind tibiae of $ considerably longer than the femora; 

 hind tibial spurs usually at least half as long again as the 

 tibial depth. 



