Coleopterological Notices. 433 



Elytra subeqiial in width to the prothorax and ahont three times as long ; 

 sides parallel and jnst visibly arcuate ; apex parabolically rounded ; disk 

 with coarse but rather feebly impressed striae which are coarsely and deeply 

 punctate, tlie punctures circular, perforate, generally separated by rather less 

 than twice their own diameters ; intervals nearly flat, finely and sparsely 

 punctured. Abdomen moderately densely and not very finely punctured, the 

 pubescence moderately dense, distinct but not conspicuous. Legs robust. 



Male. — Anterior tarsi strongly dilated, the second joint much longer than 

 the third ; intermediate more feebly but distinctly dilated ; abdomen narrowly 

 and very feebly flattened in the middle toward base. 



Length 4.7-5.8 mm. ; width 1.9-2.5 mm. 



Texas (El Paso) ; Arizona (Tuqsou) ; Colorado. 



The typical forms of this species are from El Paso ; those from 

 Tucson differ, and apparently form two varieties, in one of which 

 the strial punctures are more approximate, and in the other much 

 coarser with more deeply impressed striae. The two from Colorado 

 are black, and have the strise finer and more feebly impressed, the 

 strial punctures being- very much smaller. I am quite certain that 

 these variations indicate several distinct species, but the material 

 before me is not sufficiently extensive to enable me to define them 

 exactly. 



The wings are well developed and as long as the elytra. 



12 B. IlistriciIS n. sp. — Elongate-oval, widest behind the middle of the 

 elytra, very dark brownish-piceous, moderately convex, rather strongly shin- 

 ing ; pubescence moderate in length and density, somewhat coarse, dark 

 fulvous, not conspicuous. Head feebly convex, rather finely punctured, not 

 very densely so toward the middle ; upper lobes of eye very large and con- 

 spicuous, separated by scarcely four times their width ; antennae rather 

 robust, gradually but unusually feebly incrassate toward apex, third joint 

 much shorter than the next two. Prothorax fully two-thirds wider than long, 

 the apex broadly, distinctly emarginate and noticeably narrower than the 

 base, the latter transverse, the lateral sinuations yqtj wide, feeble but dis- 

 tinct ; basal angles very slightly obtuse but not in the least rounded ; sides 

 almost evenly but feebly arcuate throughout ; disk rather finely, very densely 

 punctate, the punctures decidedly sparser toward the middle and crowded but 

 not very coalescent laterally. Scutellum moderate. Elytra fully three times 

 as long as the prothorax and somewhat distinctly wider ; sides feebly arcuate ; 

 apex somewhat strongly, parabolically rounded ; disk with rather coarse but 

 extremely feebly impressed striae which are somewhat coarsely punctate, the 

 punctures circular, deep and perforate, generally separated by from one-half 

 more than to twice their own diameters ; intervals flat, sparsely, rather finely 

 punctured. Abdomen polished, finely and sparsely punctate, the pubescence 

 rather long, pale and somewhat conspicuous. Legs not very robust. 



