AMERICAN COLEOPTERA. 333 



sopis, it is, however, more elongate and parallel, witli a broader scutel- 

 lum and the last abdominal segment broadly concave. 

 One specimen from the Peninsula of Lower California. 



B. iiioriiatiis, n. sp. — Moderately robust, pale rufo-testaceous, sparsely 

 but evenly clothed with cinereous pubescence. Head densely but not coarsely 

 punctured. Antennae as long as head and thorax, pale rufo-testaceous. Tho- 

 rax nearly as long as wide at base, sides moderately arcuate and gradually 

 converging from base to apex, base lobed at middle, lobe broadly rounded; sur- 

 face coarsely and sparsely punctured, sparsely cinereo-pubescent. Scutellum 

 short, small, transverse, sparsely clothed with whitish pubescence. Elytra at 

 base not broader than thorax, conjointly nearly as wide as long, sides moder- 

 ately arcuate, moderately striate, strise punctured, intervals flat, densely punc- 

 tulate and with a row of distant coarser punctures; color pale rufous, sparsely 

 clothed with cinereous pubescence. Pygidium broadly oval, finely rugulose 

 sparsely pubescent. Body beneath and legs pale rufous, sparsely cinereo-pu- 

 bescent. Length .16 inch ; 4 mm. 



Easily known from all the species of the group by its broad scutel- 

 lum, pale rufous color which is the same above and beneath, and the 

 pubescence which does not conceal the surface color and yet is not 

 dense. 



One specimen, Middle States. 



B. pecturalis, n. sp. — Oblong oval, moderately robust, rufous, meso- and 

 metasterna black, elytra finely striate, clothed with fine whitish-yellow, silken 

 ]3ubescence. Head punctured, front sub-carinate, black, occiput rufous. An- 

 tennae as long as head and thorax, subserrate, black, three basal joints rufous. 

 Thorax trapezoidal, scarcely wider at base than long, sides nearly straight, 

 base at middle feebly lobed; surface moderately convex, sparsely sub-muri- 

 cately punctured and rugulose, and sparsely clothed with short silken pubes- 

 cence of variable color from whitish to rufous. Scutellum small, round, 

 pubescence whitish. Elytra at base not wider than thorax, surface finely 

 striate, strise finely punctured, intervals flat, densely punctulato-strigose and 

 with an obsolete row of coarse punctures on the middle of each interval; color 

 rufotfs, humeral region and epipleurae darker, pubescence silken, yellowish, at 

 apex inclining to brown. Pygidium equilateral, triangular, sparsely punc- 

 tured and clothed with whitish pubescence. Body beneath black, abdomen 

 rufous, sparsely clothed with whitish pubescence. Legs pale rufous, bases of 

 hind femur and tibia piceous. Length .12 inch; 3 mm. 



This is the only species in the present group in which the pubes- 

 cence has a silken lustre. The elytra are also more finely striate than 

 is usual in the genus. 



One specimen, Texas. 



B. uniform!*. Lee. Proc. Acad., 1858, p. 77.— Elongate oval, more attenu- 

 ate in front, rufous, clothed with cinereous yellow pubescence nearly conceal- 

 ing the surface color. Head rufous, punctulate, front obsoletely subcarinate. 

 Antennae scarcely as long as head and thorax, rufous. Thorax nearly as long as 



TRANS. AMER. ENT. SOC. (43) JANUARY, 1873. 



