28 PROCEEDINGS OP THE AMERICAN ACADEMY. 



not very light nor extensive, and therefore incon- 

 spicuous. 



A 1 . Hind tibial spurs generally excessively diver- 

 gent, extending in nearly opposite directions on the 

 two sides and set at a high angle with the tibia. 



35. divergens. 



h?. Hind tibial spurs rarely exceeding 120 in 

 divergence, and set at an angle with the tibia not 

 exceeding 50. 



i\ Smaller species, with pallid sides, luteous 

 legs, and narrow dorsal stripe, the hind tibiae of 

 the $ a twelfth as long again as the femora. 



23. ccecus. 



i 2 . Larger species, with castaneous sides and legs 

 and broad dorsal stripe, the hind tibiae of $ not 

 a thirtieth longer than the femora . 26. salki. 

 g*. Dorsal surface of body with conspicuously con- 

 trasted dark and light markings, neither prevailing 



over the other 47. pallidus. 



y 2 . Hind tibiae of $ a tenth longer than the femora. 



32. bicolor. 



e 2 . Outer carina of hind femora of $ more or less deli- 

 cately serrate or armed with recumbent spines. 

 f l . Body of male very compact, short subfusiform, not 

 or hardly more than two and a quarter times as long as 

 broad. 



g l . Hind femora of $ relatively stout, considerably 

 less than three times as long as broad, the hind tibiae 

 longer than the femora, and the spurs only as long as 



the tibial depth 24. nigricans. 



g 2 . Hind femora of $ relatively slender, three times 



as long as broad, the hind tibiae shorter than the 



femora and the spurs nearly half as long again as the 



tibial depth .. .'.-.... 25. fusiformis. 



/ 2 . Body of $ much more elongated, rarely distinctly 



fusiform, over three and generally at least four times 



as long as broad. 



g l . Hind tibiae of $ at least a tenth longer than the 

 femora. 



h l . Body without conspicuously contrasted colors ; 

 hind femora of relatively slender, four times as 

 long as broad 36. occultus. 



