316 GEO. H. HORN, M. D. 



first two denticles acute and nearly equal in size, the third denticle is 

 broader, shorter and sometimes bifid or emarginate so as to appear as 

 if four denticles were present; the lower edge of the femur is finely 

 crenulate and the apex of the tibia obliquely truncate and the inner 

 angle prolonged. The thorax is campanulate in form, the hind an- 

 gles decidedly laminiform and the disc rather deeply channelled along 

 the middle, the groove being bounded by an obtusely elevated ridge 

 interrupted at its middle. The body is of robust form, sub-quadrate 

 in outline, elytra feebly convex or sub-depressed. Antennae similar 

 in the sexes, gradually thicker at tip and slightly more robust in the 

 male. 



B. mimus. Say, Cure. N. A , p. 2; Am. Ent. Edit. Lee. i., p. 260 ; cratcegi, 

 Soli. Cure, v., p. 119; murinus, Sch. (err. pro mimus, Say) Cure, v., p. 132 j 

 borealis, Sch. Cure, v., p. 132. — Brownish, varigated with cinereous, blackish 

 and white pubescence. Head elongate oval, densely punctured, slightly con- 

 stricted behind the eyes, front earinate, sparsely clothed with cinereous and 

 ochreous hairs. Antenna? pale rufous, basal four joints cylindrical, outer joints 

 flattened and rather suddenly broader. Thorax campanulate, hind aDgles 

 laminate, disc interruptedly bicostate and on each side near the base a small 

 tubercle; surface sparsely clothed with ochreous pubescence, costse at summit 

 black or dark brown divided by a small whitish spot. Scutellum quadrate, 

 a median line distinctly impressed, apex emarginate, clothed with brownish 

 hairs. Elytra nearly as broad as long, disc sub-depressed, sides moderately 

 rounded, surface striate, strias punctured, intervals flat, densely punctulate; 

 color dark brown to rufous, clothed with cinereous, whitish, ochreous and black 

 hairs, the latter arranged as follows: a cordiform spot common to both elytra 

 behind the scutellum and small lines on the intervals irregularly disposed 

 tipped with white at basal end. Pygidium nearly vertical, moderately convex, 

 clothed with whitish hairs J or with a large, siftooth, oval, brown space %. 

 Body beneath dark brown, densely punctulate, sparsely clothed with cinere. 

 ous hairs. Legs pale rufous, hind femur usually darker, and on the under side 

 pieeous, hind tibise with piceous band at middle, apex spiniform. Length .12 

 inch : 3 mm. 



Abundant from the .Middle States southward and westward to Texas 

 and Kansas. The markings of the elytra formed by the distribution 

 of the pubescence of various eclors are extremely variable, the cordi- 

 form spot near the middle behind the scutellum is very constant and 

 characteristic of the species. There need be no difficulty in distin- 

 guishing it from any other species, by the bicostate thorax and strong 

 femora. It has been widely distributed in cabinets under the name 

 cratsegi, Sch., the name mimus, Say, having apparently been lost 

 sight of. Through an error in the reading of Say's name, Schonherr 

 proposed borealis for what he supposed to be murinus, which was pre- 



