458 Coleopterological Notices. 



Male. — Anterior tarsi feebly but distinctly dilated, finely, densely spongy- 

 pubescent beneath ; intermediate just visibly dilated, spongy-pubescent like 

 the anterior ; abdomen narrowly and feebly impressed, the basal segment not 

 abruptly more densely punctate in the middle. 



Length 4.3-5.0 mm. ; width 1.8-2.1 mm. 



Texas (Galveston). 



A rather small species, resembling moestus and pulverulentvs, 

 differing from both in the much more feebly dilated male tarsi, and 

 from mcestus, in addition, in the development of the wings, In 

 arenarius the hind wings are extremely rudimentary, consisting of 

 a slender parallel fillet of semi-opaque cellular membrane, which is 

 but slightly more than one-half as long as the pronotum. 



39 B. debilis n. sp. — Narrow, moderately convex, very slightly cuneate 

 in the male, black, rather strongly shining ; pubescence fine, moderate in 

 length, recumbent, rather sparse but cinereous and distinct. Head moderate, 

 transverse, feebly convex, rather finely, evenly and sparsely punctate through- 

 out, the punctures a little elongate and separated by nearly twice their own 

 widths ; upper lobe of eyes rather large and nearly circular ; antenna? slender, 

 rather short, club feeble, second joint longer than wide, equal to the sixth and 

 shorter than the fifth, third subequal to the fourth, the fifth a little shorter. 

 Prothorax two-thirds wider than long, widest before the middle where the sides 

 are feebly and roundly subangulate, thence very feebly convergent and nearly 

 straight to the base and more strongly convergent and slightly arcuate to the 

 apex, which is broadly, distinctly emarginate in circular arc ; base transverse, 

 the lateral sinuations moderately distinct; disk evenly, rather feebly convex, 

 finely and rather sparsely punctate, the punctures separated by nearly three 

 times their own widths except toward the sides, where they are distant by about 

 twice their diameters ; interspaces minutely and feebly reticulate. Scutelluni 

 small, feebly punctate. Elytra nearly twice as long as wide and almost three 

 times as long as the prothorax, scarcely as wide as the latter, gradually nar- 

 rowed behind from before the middle, the apex rather acute, finely striate, the 

 striae very feebly impressed, the punctures very distant in the median stria 3 , 

 where they are separated by from four to six times their own diameters, but 

 closer in the stria? toward the suture ; intervals nearly fiat, minutely and 

 sparsely punctate, finely, rather strongly reticulate and feebly undulated. 

 Abdomen polished, very finely, sparsely punctate, minutely, finely and very 

 sparsely pubescent. Legs moderate, rufo-piceous. 



Male. — Anterior tarsi feebly but distinctly dilated, finely, densely spongy- 

 pubescent beneath ; intermediate but slightly less dilated than the anterior, 

 similarly clothed ; abdomen almost absolutely without trace of impression or 

 flattening toward base. 



Length 3.6 mm. ; width 1.3 mm. 



Texas (Dallas). 



This very small species is decidedly aberrant not only in facies 



