SCUDDER. NORTH AMERICAN CEUTHOPHILI. 27 



f 1 . Hind femora of $ relatively long, three and a half 

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



30. maculatus. 



f 2 . Hind femora of $ relatively stout, rarely exceeding 

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

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

 ff 1 . Hind tibiae of $ at least a tenth longer than the 

 femora. 



A 1 . 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 2 . 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 2 . Hind tibiae of less than one tenth longer than 



the femora 22. spinosus. 



e 2 . Hind tibiae of $ at most scarcely longer than the 

 femora; hind tibial spurs rarely longer than the tibial 

 depth. 



f 1 . 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 1 . Hind tibiae of $ at most feebly sinuate at base. 



39. agassizii. 

 g 2 . Hind tibiae of $ very strongly bowed. 



34. vcdyus. 



f' 1 . Hind femora of $ less than three times as long as 

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

 notum. 



g 1 . Hind tibiae of $ strongly bowed, armed below 

 with a row of spines mounted on nodules. 



33. nodulosus. 

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



armed beneath 51. latipes. 



cP. Hind tibiae of $ straight throughout. 



e 1 . Outer carina of hind femora of armed with prom- 

 inent conical spines, generally well separated. 

 f 1 . Hind tibiae of $ less than one tenth longer than 

 the femora. 



f) 1 . Dorsal surface of body almost uniformly very 

 dark, almost black, the lighter markings themselves 



