SCUDDER. NORTH AMERICAN CEUTHOPHILI. 29 



h 2 . Body with conspicuously contrasted colors; hind 

 femora of <$ relatively slender, less than three and 

 a quarter times as long as broad . 46. discolor. 



g 2 . Hind tibiae of $ less than one tenth longer than 



the femora. 



A 1 . Hind femora of $ with no raised points on the 

 upper distal half. 



1 1 . Outer carina of hind femora of $ almost 

 unarmed ; markings of the body more or less 

 marmorate or maculate. 



J 1 . A broad continuous light dorsal stripe on 

 pronotum, usually extending over the whole 

 thorax. 



k 1 . Hind tibial spurs distinctly marked with 

 black at base ; ovipositor twice as long as 



fore femora 27. latens. 



k 2 . Hind tibial spurs at most indistinctly 

 infuscated at base ; ovipositor shorter than 



fore femora 31. tenebrarum. 



j 2 . A narrow and very unequal light dorsal 

 stripe on pronotum, interrupted^ if present, on 

 rest of thorax 38. bruneri. 



1 2 . Outer carina of hind femora of $ finely and 

 closely serrate ; dark markings of body confined 

 to transverse borderings of the segments. 



48. vinculatus. 



h 2 . Hind femora of $ with a greater or less num- 

 ber of raised points on upper distal half. 

 i 1 . Hind femora of $ with only a few distant 

 recumbent spines on outer carina. 

 j 1 . Hind tibiae of $ a tenth longer than the 

 femora; spurs fully twice as long as tibial 



depth 44. pinguis. 



j 2 . Hind tibiae of $ less than a tenth longer 



than the femora ; spurs much less than twice 



as long as tibial depth . . 40. mexicanus. 



i?. Hind femora of $ with numerous denticula- 



tions on the outer carina, forming a more or less 



close serration. 



j 1 . Ovipositor relatively short, at most bu( 

 little more thau half as long as hind femora. 



