598 Coleojiterological Notices, VI. 



continued to the apex by the rounded membranous appendage, 

 the latter leaving a small part of the tip of the claw free ; the 

 outer claw has the inner corneous dilatation extending far be3'ond 

 the middle, but the appendage forms merely a membranous ter- 

 minal margin ; the apical portion of the outer claw is more pro- 

 longed and arcuate than the corresponding part of the inner claw. 

 The tibiiB are altogether devoid of external spinules, but are 

 clothed sparsely throughout with long erect and stilt' black hairs, 

 and the pronotum has no trace of a submarginal line. The body 

 is extremely elongate and subcylindrical, differing vcr^' much in 

 facies from an}- other iy\iQ. of the tribe. 



Two species may be assigned to this genus as follows, fovei- 

 collis serving as the type of the above remarks : — 



Prothorax one-third wider than long 1 . foveicollis 



Prothorax nearly twice as long as wide 2. teiiiiiforiuis 



This genus seems to occur principall}' on the eastern slopes of 

 the Rocky Mountains from Texas to Hudson Bay, but probabl}- 

 entered the American continent by way of Siberia. 



1. D. foveicollis Kirby— Fauna Bor. Am., IV, p. 243 (Dasytes); Lee: 

 Proc. Acad. Nat. Sci., Phila., 1866, p. 358 (Dolichosoina). 



Very elongate, subcylindrical and convex, black with a strong 

 blue "reflection; legs black, the antenui^ black with the second 

 joint, and, to a less degree, the first, testaceous ; pubescence stiff, 

 long, erect and black, very sparse, the hairs of the elytra varying 

 in length ; marginal fringe completely obsolete ; integuments 

 strongly shining. Head five-sixths as wide as the prothorax, 

 wider than long, coarsely and sparsely punctate, convex, with two 

 deep impressions anteriorly which are posteriorly confluent ; sur- 

 face between the antennoe tumid ; epistoma truncate, the labrum 

 broadly rounded ; eyes obliquely oval, not attaining the base, the 

 neck rapidly narrowed behind them ; antennae long, compressed, 

 only feebly serrate, much longer than the head and prothorax, not 

 incrassate toward tip, the joints longer than wide. Prothorax one- 

 third wider than long, the sides subparallel and broadly arcuate, 

 feebly convergent and nearly straight posteriorly, the disk widest 

 before the middle, sparsely and ver}- coarsely punctate and slightly 

 uneven ; base truncate, with the angles somewhat obtuse ; lateral 

 edges very acute. Elytra two and two-thirds times longer than 

 wide, distinctly wider than the prothorax, the sides subparallel 



