336 GEO. H. HORN, M. D. 



form. The form and sculpture agree in the larger and smaller specimens, 

 which differ only in size. Length .10 inch; 2.5 mm. 



Abundant everywhere in California, from San Francisco southward. 



B. (listiiiguciitlns, u. sp. — Form robust, color black, sparsely cinereo- 

 pubescent, elytra with pubescence irregularly arranged. Head black, opaque, 

 finely rugulose. Antenna? somewhat longer than the head and thorax, sub- 

 serrate, black, second and third joints small moniliform % , third joint longer 

 9 . Thorax slightly broader at base than long, sides moderately arcuate and 

 gradually narrowed to the front, base feebly lobed ; surface coarsely punctured, 

 at sides irrorate with patches of cinereous pubescence, median space scarcely 

 pubescent. Scutellum longer than wide, median line not impressed, clothed 

 with whitish pubescence. Elytra conjointly as broad as long, sides strongly 

 arcuate, at base becoming* rapidly broader than the thorax, surface striate* 

 stria? at bottom punctured, intervals flat, finely rugulose and with a row of 

 coarse punctures and clothed with cinereous pubescence broadly interrupted. 

 Pygidium broadly oval, coarsely punctured, sparsely cinereo-pubescent. Body 

 beneath black, sparsely pubescent. Legs all black 'J,, anterior and middle 

 pair rufous 9 • Length .10 inch ; 2.5 mm. 



This species has the robust form of some of the species of Group IV. 



Two specimens, Georgia. 



B. ealvus, n. sp. — Oblong oval, black, very sparsely cinereo-pubescent. 

 Head black, finely punctured, opaque. Antennae as long as head and thorax, 

 black, sub-serrate. Thorax slightly broader at base than long, sides moder- 

 ately arcuate and gradually narrowed to apex, base feebly lobed at middle; 

 surface finely ruguloso-punctate, and very sparsely pubescent. Scutellum 

 small oval, with white pubescence. Elytra conjointly less wide than long, 

 gradually becoming broader at base, sides moderately arcuate : surface shining, 

 finely striate, striae indistinctly punctured, intervals flat, finely punctulate, 

 very sparsely cinereo-pubescent. Pygidium nearly equilateral, feebly convex, 

 coarsely punctured, cinereo-pubescent. Body beneath and legs black, finely 

 and sparsely pubescent. Length .08 inch ; 2 mm. 



More shining and less pubescent than any species of the group. 



Massachusetts and Tennessee. 



B. fraterculjis, n. sp. — Black, moderately shining, form moderately ro- 

 bust, surface not densely clothed with cinereous pubescence, giving the surface 

 a pruinose appearance. Head black, opaque, epistoma coarsely punctured, 

 occiput and vertex with few fine punctures. Antenna; black, basal joint pice- 

 ous, as long as head and thorax, feebly sub-serrate. Thorax one-fourth wider 

 at base than long, sides feebly arcuate and gradually narrowed to apex; base 

 moderately lobed at middle; disc moderately convex, coarsely and rather 

 roughly punctured, very sparsely pubescent. Scutellum longer than wide, 

 median line distinct. Elytra slightly longer than wide conjointly, sides moder- 

 ately arcuate, surface striate, striae punctured, intervals flat, densely punctulate, 

 at base somewhat rougher, sparsely cinereo-puaescent. Pygidium oval, 

 moderately convex, coarsely and sparsely punctured and pubescent. Body be- 

 neath black, moderately shining, sparsely pubescent. Legs black. Length 

 .OS— .12 inch; 2—3 mm. 



