1878. ] 587 {Horn. 
less excavated at middle, and without elevated lines. Humeri rounded, the 
angle incurved, In its other characters this genus agrees with Mucilotes. 
Two species occur in our fauna. 
Thorax rather deeply excavated, abdomen sparsely punctulate..montanus. 
Thorax vagucly concave, abdomen coarsely and deeply punctate. geminatus. 
B. montanus, 0. sp. 
Oblong, moderately elongate, ferruginous brown, shining, very sparsely 
pubescent. Head coarsely and moderately densely punctured. Thorax 
longer than wide, narrower at base, apex emarginate, angles slightly 
prominent, base arcuate, sides feebly arcuate, a small tooth at the middle 
of the margin, posterior angles distinct, disc with two deep fover at mid- 
dle, the anterior larger, surface coarsely and densely punctured, sparsely 
pubescent. Elytra slightly broader than the thorax, moderately elongate, 
base emarginate, humeri rounded, the tip of humeri inflexed, dise moder- 
ately convex, surface striate, strize punctured, intervals alternately more 
elevated, pubescent and distinctly punctured, the seventh sub-costiform, 
intermediate intervals flat, smooth. Prothorax beneath coarsely and deeply 
punctured. Abdomen rather sparsely and finely punctured. Femora 
sparsely punctured, tibize densely punctured and pubescent. Length .18- 
.24 inch ; 4.5-6 mm. 
Taken by Mr. H. K. Morrison in the mountains near San 
Juan, Colorado. 
B. geminatus Say, (Zyctus) Journ. Acad. V. 262; Am. Ent. edit. 
Lec. II, p. 323. , 
Oblong, moderately elongate, ferruginous or brownish, moderately 
shining. Head densely and moderately coarsely punctured. Thorax 
longer than wide, narrower behind, apex feebly emarginate, sides feebly 
arcuate, a feeble dentiform tubercle at middle of margin, disc vaguely con- 
cave, coarsely and moderately densely punctured, a smooth spot at middle 
of apical margin. Elytra as in the preceding, disc flat ¢ or slightly con- 
vex Q, surface striate, strie finely punctured, intervals alternately wider, 
the wider intervals with a single series of punctures, and slightly pubes- 
cent, the narrower smooth. Body beneath coarsely and deeply punctured. 
Legs as in the preceding. Length .10.-18 inch ; 2.5-4.5 mm. 
This species differs in many characters from the preceding, 
the thoracie, elytral and abdominal sculpture being the most 
important. 
Appears to be widely diffused, occurring in the Atlantic 
region, extending west to Kansas and south to Texas, also in 
the Island of Santo Domingo (Gabb). 
