SCUDDER. — NORTH AMERICAN CEUTHOPHILI. 27 



/^ Hind femora of S relatively long, three and a half 

 times as long as broad ; no large spines on outer carina. 



30. macvlntus. 



f^. Hind femora of $ relatively stout, rarely exceeding 



three, never three and a quarter, times as long as broad j 



some spines on outer carina as long as the tibial spurs. 



g^. Hind tibiai of $ at least a tenth longer than the 



femora. 



h^. Hind femora of $ two and a half times longer 

 than the fore femora ; hind tibial spurs only 

 slightly longer than the tibial depth. 



28. meridionalis. 



h"^. Hind femora of $ but little more than twice 



as long as the fore femora ; hind tibial spurs nearly 



twice as long as the tibial depth . 45. inquinatus. 



g". Hind tibiae of $ less than one tenth longer than 



the femora 22. spinosus. 



e^. Hind tibire of $ at most scarcely longer than the 



femora ; hind tibial spurs rarely longer than the tibial 



depth. 



f^. Hind femora of $ three or more than three times 



as long as broad ; fore femora nearly or quite a fifth 



longer than the pronotum. 



g^. Hind tibiiB of $ at most feebly sinuate at base. 



39. agassizii. 

 g"^. Hind tibiae of $ very strongly bowed. 



34. valgus, 

 f'^. Hind femora of $ less than three times as long as 

 broad ; fore femora only an eighth longer than the pro- 

 notum. 



g^. Hind tibise of ^ strongly bowed, armed below 

 with a row of spines mounted on nodules. 



33. nodulosus. 

 g"^. Hind tibiae of $ faintly sinuate at base, normally 



armed beneath 51. latipes. 



cP. Hind tibiae of $ straight throughout. 



e^. Outer carina of hind femora of ^ armed with prom- 

 inent conical spines, generally well separated. 

 f^. Hind tibitB of ^ less than one tenth longer than 

 the femora. 



g^. Dorsal surface of body almost uniformly very 

 dark, almost black, the lighter markings themselves 



