164 Coleopterological Notices, III. 



with a large deep angulate emargination, extending almost to the base of the 

 segment, the anterior half of the emargination filled with a depressed concave 

 coriaceous plate, which is broadly sinuate posteriorly ; supplementary segment 

 deeply bilobed. 



Female. — Eyes separated by nearly one-half more than their own width ; 

 antenna? one-half as long as the body, the joints scarcely more than twice as 

 long as wide, the third twice as long as the second, much longer than wide and 

 one-half as long as the fourth ; anterior tarsi normal, slender ; fifth ventral 

 segment entire, sparsely punctate, broadly feebly impressed in the middle. 



Length 7.5-9.0 mm. ; width 3.3-4.4 mm. 



Pennsylvania ; Virginia ; Indiana. 



The longitudinal convexity of this species is rather greater than 

 usual, and the punctuation is much more minute than in any other 

 of our species. It will be noticed that the male modification of the 

 anterior tarsi is of precisely the same nature as that of Androchirus. 

 The occasionally pale elytra of this species is a character similar to 

 that observed in Agriotes fucosus ; it does not depend in any way 

 upon the sex of the individual. 



C. theveneti Horn. — Trans. Am. Ent. Soc, Sept., 1875, p. 156. — 

 Elongate-oval, rather strongly convex, piceous-black ; femora red, the tibia? 

 and tarsi infuscate ; lustre dull. Head very small, flattened above, finely but 

 strongly, extremely densely punctate, the punctures in mutual contact ; eyes 

 very small, separated in the male by distinctly more than twice their width ; 

 antenna? in the male nearly as long as the body, the fourth joint almost twice 

 as long as the two preceding together, much shorter in the female, with the 

 fourth joint just visibly longer than the two preceding combined. Prothorax 

 about one-half wider than long, the sides broadly, evenly arcuate, strongly 

 convergent from base to apex, the latter narrow and truncate ; base trans- 

 verse, broadly, distinctly bisinuate ; disk. finely, excessively densely punctate, 

 the punctures closely crowded, the lustre dull. Elytra scarcely more than 

 three times as long as the prothorax, and, in the middle, but slightly wider ; 

 sides parallel, feebly arcuate, continuous in curvature with those of the pro- 

 thorax ; disk finely, distinctly striate, the stria? not very coarsely or closely 

 punctate, the intervals feebly convex, minutely, extremely densely punctate. 

 Abdomen more shining, finely, feebly, rather densely punctate. Legs slender, 

 the basal joint of the hind tarsi four-fifths as long as the remainder. Length 

 6.5-8.5 mm. ; width 2.7-3.4 mm. 



California (Sierras). 



Easily distinguishable by its narrow convex form and bright red 

 femora, as well as the unusually elongate male antennae. The 

 elytral intervals appear to be much more strongly convex in the 

 male than in the female ; in the latter sex they are quite flat. 



This species differs remarkably from brevis in the male sexual 



