Goleopterological Notices, VII. 41 T 



•example the surface of the abdomen through the first four seg- 

 ments is clothed with long and erect hairs, and the fifth segment 

 is notably large and convex. 



This species is distinct by reason of its form, color and trans- 

 versely impressed pronotum, which latter character is very unusual 

 in this portion of the genus, although common among the allies 

 of capillosulum. 



24. C. clavicorne n. sp. — Scyd. irevicomis Lee. nee Say. : Proc. Acad. 

 Nat. Sci., Phila., 1852, p. 153. — Rather stout, suboval, polished and subim- 

 punctate, pale rufo-testaceous throughout ; legs and antennae concolorous ; 

 pubescence very abundant, coarse, pale and conspicuous, densely bristling on 

 the head and prothorax, rather short and subdecumbent on the elytra. Head 

 moderate in size, semicircular behind the eyes, which are somewhat small and 

 scarcely at all prominent ; clypeal tooth well developed, elongate and slender. 

 Antennse stout, rather shorter than the head and prothorax, strongly clavate, 

 the club gradual in formation; second joint slightly obconic, }4 longer than 

 wide and as long as the next two; three to six equal in width and slightly 

 narrower; third and sixth distinctly, fourth slightly, wider than long; fifth 

 almost as long as wide; six to nine increasing evenly and rapidly in width; 

 seventh ^^, eighth %, ninth and tenth fully ^ij wider than long, the last two 

 subequal; eleventh not thicker, conoidal, rapidly pointed, the apex not dis- 

 tinctly oblique. Prothorax conic, the sides nearly straight, not quite as long 

 as wide; apex rather more than }4 ^s wide as the base, the latter about % 

 wider than the head; surface perfectly even. Elytra stout, oval, widest near 

 the middle, obtusely rounded behind, ig longer than wide, twice as long as 

 the prothorax and ^5 wider, the sides almost evenly arcuate; humeral plica 

 short but distinct, oblique, the subhumeral impression short and moderately 

 distinct; outer fovea strong; subsutural impressions almost obsolete, the suture 

 at most very minutely beaded toward base. Legs rather well developed, the 

 femora strongly clavate, the posterior slightly less strongly so than the others. 

 Length 1.35-1.55 mm.; width 0.55-0.6 mm. 



Pennsylvania and New York to Iowa (Iowa Cit}^). 



The description is drawn from the female, but the male differs 

 'but slightly, being a little smaller and darker in color, the el^^tra 

 uniform dark piceous-brown and with longer sparse erect setse 

 more evidently interspersed among the coarse recurved hairs ; 

 the antennal differences seem to be very slight. 



This species is said by LeConte to inhabit the nests of a small 

 black ant, but I have seen it associated also with a large brown 

 ant ; it is probably not truly myrmecophilous, but associates itself 

 occasionally with ants of various species, as in the case of a very 

 large number of Coleoptera of widely diverse families. 



In describing Scydmsenus hrevicornis, Say states that the elytra 



