Coleopterological Notices. 435 



rated by rather less than their own diameters toward the suture, 

 but in one specimen from Nebraska they are separated by from two 

 to three times this amount. The pronotal punctuation is very fine 

 and dense in the Texan forms, with but little tendency to coalescence 

 laterally. There are apparently no stable characters, however, upon 

 which to base recognizable species and I therefore leave this subject 

 for future investigation. 



The wings are extremely rudimentary, consisting of a very small 

 parallel subopaque cellular fillet, devoid of venation, but slightly 

 more than one-half as long as the prothorax, one-fifth as long as 

 the elytra, and rather more than twice as long as wide. The elytra 

 are subconnate. 



14 B. oregoneiisis n. sp. — Oblong-oval, rather strongly convex, aluta- 

 ceous in lustre, grayish-black ; legs dark rufous ; pubescence moderate in 

 length, rather sparse but coarse, pale yellowish-cinereous in color and very 

 distinct, easily removable. Head moderately transverse and convex, rather 

 finely and feebly punctate, the punctures a little coarser and longitudinally 

 subcoalescent toward the middle of the vertex ; upper lobe of eyes moderate, 

 surrounded except posteriorly by a very deep impressed groove ; antenna* 

 moderate, gradually and feebly incrassate toward tip, third joint short, not 

 twice as long as the second and very much shorter than the next two, joints 

 three to five uniformly and very rapidly decreasing in length. Prothorax rather 

 transverse, about three-fourths wider than long, very feebly narrowed from 

 base to apex ; sides almost evenly and rather strongly arcuate in the male, 

 straighter or even very broadly sinuate toward base, the latter transverse, the 

 lateral sinuations strong, the basal angles right, not at all rounded and rather 

 prominent ; disk finely, very densely and rather feebly punctured, a little 

 more sparsely so toward the middle, tending to coalesce longitudinally toward 

 the sides. Scutellum moderate, ogival. Elytra, behind the middle, quite 

 distinctly wider than the prothorax, scarcely three times as long as the latter ; 

 sides distinctly arcuate posteriorly ; disk very finely striate, the striae exceed- 

 ingly feebly impressed and not much more strongly so externally in the female, 

 but rather strongly impressed throughout in the male, very finely and closely 

 punctured throughout ; intervals usually slightly convex in the male and flat 

 in the female, very finely and rather sparsely punctate. Abdomen polished, 

 finely, not densely punctate, the pubescence short and fine, pale and distinct 

 but not conspicuous. Legs rather slender. 



Mule. — Anterior tarsi strongly dilated, the second joint decidedly longer 

 than the third ; intermediate very feebly dilated ; both pairs rather coarsely 

 and not very densely squamulose beneath ; abdomen rather broadly and 

 feebly but distinctly impressed in the middle toward base, fifth segment 

 strongly impressed. 



Length 5.0-5.5 mm. ; width 2.1-2.4 mm. 

 Annals N. Y. Acad. Sci., V, Nov. 1890.— 29 



