NORTH OF MEXICO. 



353 





angles. The elytra are deeply striate, the interstices flat and densely punctured. The sur- 

 face is clothed with a pubescence similar to sordidw, but coarser and paler. The color of 

 the body is opaque brown. 



Length .23 inch. 



Found at Tort Yuma, California. 



B. aurlpilig, elongate oval, opaque brown. Head moderately, coarsely and densely punctured. Thorax con- 

 vex from the edge without depressed margin, broader than Long, sides gradually converging and moderately rounded. 

 Apex eniarginate, basal angles distinot, base sinuate, lobed at middle with angles prominent backwards, surface 

 densely punctured. Elytra feebly striate, strise punctured, interstices moderately convex and densely and finely punc- 

 tured. Upper surface of body moderately densely clothed with golden yellow scale-like hairs. Beneath linelv and 

 densely punctured and clothed with similar but liner pubescence. 



Length .;S0 inch. 



Easily known from the species which precede, by the absence of a depressed thoracic 

 margin, and from those which follow by the vcstiture of the surface of the body. It is 

 tin; most convex of our species. 



Occurs at Camp Grant, Arizona, in company with sordid '/w, (bough less abundant. 



B. dilafatus, Lee., Ann. Lye. V., 146. 



This species is usually black or deep brown in color, sub-opaque. The thorax is feebly 

 convex, slightly flattened behind tin; head, sides rounded, broaden- at middle than at base. 

 Apex moderately emarginate, base- sinuate, angles not prominent. A slight impression 

 on each side of base opposite the fourth elytra! interval. Surface coarsely and densely 

 punctured, punctures elongate and confluent. Elytra feebly convex, striate;, striee coarsely 

 and closely punctured, intervals flat, finely but sparsely punctured; surface sparsely 

 clothed with brownish hairs. 



Length .30 inch. 



Occurs with aordidiM, but is still more; abundant. 



B. brevioollis, Lee., Ann. Lye. V., 147. 



Similar in its characters to the preceding, differing in the shorter thorax, less rounded 

 on the sides, less coarsely and confluently punctured. The form is slightly more elongate 

 and more convex. The vestiture and sculpture are similar to dilatatus. The legs paler. 



Length .2G-.28 inch. 



Occurs rather abundantly near San Francisco. 



B. leoontei, Muls., Opusc. Entom, Cab. !), p. 128; pubescent | Lee, Ann. Lye. V., p. 147. 



More elongate and convex than the two species which precede. The thorax is less 

 rounded on the sides and not broaden- at middle than at base. The 1 basal margin is less 

 strongly sinuate. The punctures of the thorax are- finer, less dense and not elongate, and 



AMBEI. P11II.OSO. SOO. — VOL. XIV. — 89 



