20 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Table of the Genera of Ceuthophili. 



a}. Last palpal joint cleft apically on the under side. Descending 

 lobes of the nit-sonotum but little longer than those of the pronotum ; 

 sides of fore and middle coxae externally laminate, the lamination 

 elevated to a denticle or compressed spine either mesially or (on middle 

 legs) apically, occasionally (Hadenoecus) wanting on middle legs. Fore 

 tibiEe not sulcate above ; hind tibi;\3 with spines of two grades on both 

 outer and inner margins of upper surface. Outer valves of ovipositor 

 unarmed above before the apex. 



b'^. Palpi long. Hind tibia3 usually considerably longer than the 

 hind femora. Third hind tarsal joint only half or less than half as 

 long as the second. 



c^. Vertex obscurely bituberculate at apex. Last palpal joint 

 DO longer or scarcely longer than the third, and cleft beneath 

 only apically. Middle coxa? unarmed. Middle femora with a 

 feeble genicular spine on posterior margin. Hind tibiie with more 

 than four pairs of spurs. First hind tarsal joint almost as long 

 as the others together. Subgenital plate of male triangular and 

 rather deeply and narrowly emarginate .... Hadenoecus. 

 (p-. Vertex not tuberculate. Last palpal joint distinctly longer 

 than the third, cleft beneath for almost its entire length. Middle 

 coxfE spined mesially. Middle femora with a distinct genicular 

 spine on posterior margin. Hind tibia? with only four pairs of 

 spurs. First hind tarsal joint generally a third shorter than the 

 rest combined. Subgenital plate of male ample and broadly 



emarginate , Ceutliophilus. 



IP'. Palpi short. Hind tibiae shorter or at most but little longer 

 than the hind femora. Third hind tarsal joint hardly shorter than 

 the second, or (in Daihinia) wanting. (Lamination of middle coxae 

 produced inferiorly to the semblance of a spine.) 



c^ Third palpal joint as long as fifth, the inferior cleft of the 

 latter extending over only the apical half Middle femora un- 

 armed at tip or with a very feeble spine. Hind tibia? shorter or 

 at least no longer than the hind femora, with few spines of the 

 second grade on the upper surface, those of the first grade rela- 

 tively numerous, at least in the 9 , more or less irregularly placed 

 and of unequal length ; the calcaria three in number on each 

 side, the uppermost generally a little the longest and unusually 

 distant from the extreme apex, so as to appear rather as an addi- 



