SCUDDER. NORTH AMERICAN CEUTHOPHILI. 25 



f^. Armature of outer carina of hind femora of $ 

 developed only as recumbent serrations ; ovipositor 

 almost or (juite straight. 



g^. Hind femora of $ slender, almost or quite four 



times as long as broad ; hind tibiae exceptionally long, 



nearly or quite one sixth longer than the femora. 



It)-. Hind femora of $ more than tveice as long as 



the fore femora ; ovipositor very feebly arcuate, 



only two thirds as long as the hind femora. 



8. palmeri, 



K~. Hind femora of $ less than twice as long as 



the fore femora ; ovipositor straight, three fourths 



as long as the hind femora ... 9. corticicola. 



g^. Hind femora of $ less slender, being less than 



three and three quarters times as long as broad ; hind 



tibias but little more than one tenth longer than the 



femora 10. varicator. 



c^. Hind tibige of $ distinctly less than a tenth longer than the 

 hind femora ; ovipositor always longer than the fore femora. 

 d^. Hind tibiiB of $ straight ; outer carina of hind femora 

 of ^ never conspicuously spined. 



e^. Hind tibial spurs nearly three times as long as the 



tibial depth 11. latibuli. 



e^. Hind tibial spurs at most less than twice as long as the 

 tibial depth, rarely half as long again. 

 f^. Prevailing colors blackish fuscous above, the lighter 

 colors being distinctly less extensive than the dark 

 (which is generally nearly black) and appearing as dots 

 or roundish spots, and sometimes also as a broad medio- 

 dorsal stripe. 



g^. Fore femora of ^ at most scarcely more than a 

 third longer than the pronotum ; outer carina of hind 

 femora of ^ serrulate, not spined. 



h}. Hind femora relatively long and slender, three 

 and three quarters times as long as broad. 



12. sechisus. 

 h?. Hind femora relatively stout, not over three 

 and a half times longer than broad. 



i^. Hind tibife but little longer than the femora, 

 the spurs not longer than the tibial depth, the 

 hind femora considerably more than twice aS 

 long as the fore femora. 



