24 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Table of the Species of Ceuthophilus. 



a 1 . Second joint of hind tarsi at least half as long again, usually twice 

 or more than twice as long, as the third. 



A 1 . Fore femora one third or more than one third longer than the 

 pronotum, at least in the $ ; hind tibiae of $ almost always 

 straight, never greatly bowed. 



c 1 . Hind tibiae of at least a tenth longer than the hind 

 femora. 



d 1 . Ovipositor much shorter than the fore femora. 



e 1 . Hind femora stout, not three times as long as broad, 



at least in the $ 1. variegatus. 



e 2 . Hind femora slender, four times as long as broad in 



the $ .2. ensifer. 



d 2 . Ovipositor much longer than the fore femora. 



e 1 . Hind tibial spurs less than twice as long as the tibial 

 depth ; outer carina of hind femora of generally with 

 some spines at least half as long as the tibial spurs. 

 f l . Fore femora of $ three fourths as long again as 



the pronotum 3. stygius. 



f z . Fore femora of $ from one half to two thirds as 

 long again as the pronotum. 



g 1 . Hind femora of $ much less than four times as 

 long as broad ; hind tibiae of $ very long and more 

 or less sinuous at base in old individuals. 



A 1 . Largest spines of outer carina of hind femora 

 of $ simple and similar to the others. 



4. gracilipes. 



h?. Largest spines as above greatly tumid at base. 



5. latebricola. 



g*. Hind femora of $ much more than four times as 

 long as broad ; hind tibiae of $ scarcely more than 

 one tenth longer than the hind femora, straight. 



6. grandis. 



e 2 . Hind tibial spurs fully twice, generally much more 

 than twice, as long as tibial depth ; outer carina of hind 

 femora of $ with no spines a third as long as the tibial 

 spurs. 



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

 developed as distinct spines rather than as serrations; 

 ovipositor arcuate 7. secretus. 



