Coleopterological Notices. 431 



densely punctate, the punctures finer anteriorly ; epistoma broadly, deeply 

 sinuate ; upper lobes of eye rather large, circular, distinctly convex, almost 

 surrounded by a deep groove, distant by scarcely more than four times their 

 own diameters ; antennae nearly as in fortis. Prothorax rather more than twice 

 as wide as the head, four-fifths wider than long, feebly narrowed from base to 

 apex ; sides strongly arcuate, more distinctly so at basal third ; apex rather 

 strongly emarginate in circular arc ; base transverse, the lateral sinuations 

 broad and distinct ; basal angles very narrowly but distinctly rounded ; disk 

 very feebly convex, widest at basal third, rather finely, very deeply and ex- 

 tremely densely punctate throughout, the ^junctures forming imperfect longi- 

 tudinal rugffi. Scutellum small, polished, minutely not densely punctate. 

 Eljtra about three-fourths longer than wide, equal in width to the prothorax 

 and rather less than three times as long ; sides parallel and very feebly 

 arcuate, together somewhat acutely rounded behind ; disk rather finely 

 striate, the striae very feebly impressed toward the suture, finely punctured, 

 the punctures round, moderately deep, becoming distinctly larger and deeper 

 laterally, generally distant by from one-half more than to twice their own 

 diameters ; intervals nearly flat, from five to six times as wide as the striae, 

 very finely, rather sparsely punctate. Abdomen polished, finely, rather sparsely 

 punctate, the pubescence fine, short, sparse and inconspicuous. Legs and 

 tarsi rather long. 



Male. — Anterior tarsi strongly dilated, the basal joint distinctly narrower 

 than the second, a little wider than long, triangular, second and third trans- 

 verse, the former slightly the wider ; intermediate tarsi very feebly dilated, 

 first and second joints equal in width, both pairs with dense pads of coarse 

 spongy pubescence beneath ; abdomen narrowly and feebly impressed in the 

 middle toward base, the fifth segment with a feeble rounded impression. 



Length 7.0-7.7 mm. ; width 3.1-3.4 mm. 



Southern California ; Arizona. 



A well-marked species, one of the largest of the genus, differing 

 from fortis, the only one to which it is allied, in addition to the 

 characters mentioned under that species, in its narrowly rounded 

 basal angles of the prothorax and slightly in the nature of the 

 pubescence, this being generally more uniform and homogeneous in 

 fortis. In the female of both of these species the anterior tarsi are 

 decidedly robust, but simply densely setose beneath. In fortis the 

 female is decidedly more robust than the male, this being more 

 noticeable than in dilatatvs. In both, the hind wings are rather 

 well developed, being nearly as long as the elytra. 



10 B. sonoraB n. sp. — Oblong, robust, moderately convex, dark reddish- 

 brown in color, the integuments dull and finely alutaceous, being very minutely 

 but strongly granulato-reticulate throughout ; pubescence short, very robust, 

 dense, bright reddish-yellow in color and conspicuous. Head very deeply, 



