NORTH AMERICAN COLEOPTERA. 249 



late; eyes small, at the base, convex, prominent, coarsely granulate; antennae 

 rather long, distinctly longer than the head and prothorax together; two 

 basal joints robust; funicle very slender; club strong, joints increasing in 

 length and thickness. Prothorax widest at two-fifths its length from the 

 apex, where it is distinctly wider than the head, one-half wider than long; 

 sides strongly arcuate anteriorly, strongly convergent and very feebly sinuate 

 toward base; the latter broadly, extremely feebly arcuate throughout, very 

 slightly narrower than the apex, nearly three-fourths as wide as the disk; 

 apex transversely truncate throughout; basal angles obtuse, scarcely percep- 

 tibly rounded; disk transversely, moderately convex, densely, feebly, irregu- 

 larly tuberculate or gianulose, the tubercles nearly confluent and differing 

 greatly in size; in the center there is a small, strongly marked canaliculation 

 two-fifths as long as the disk, and, at each basal angle, a small impressed 

 puncture. Elytra at base as wide as the prothorax; sides parallel, distinctly 

 and nearly evenly arcuate; together abruptly, very broadly rounded behind; 

 apex broadly truncate; disk widest in the middle, where it is distinctly wider 

 than the prothorax, nearly one-half longer than the head and prothorax to- 

 gether, rather depressed in the middle, rather abruptly, strongly convex at the 

 sides, finely, evenly, not very densely, subasperately punctate; asperities not 

 definitely arranged. Scutellum moderate, asperate, triangular, slightly wider 

 than long. Under surface pale brownish-testaceous, except the abdomen 

 toward base, which is dark, blackish-piceous. Legs rather slender, short; 

 tarsi rather short, very slender. Length 0.35 mm. 



Texas; (Austin 1). 



This sj)ecies can be readily recognized by its very minute 

 size, there being but one smaller species of Coleoptera 

 known; it is also distinguished by the peculiar form and 

 structure of the prothorax. The metasternum appears to 

 extend to the elytra at the sides. 



P. Hornianum Matth., which is of about the same size as 

 the present sj)ecies, differs from it in color, shape and 

 sculpture. 



SMICRUS Matth. 



S. americanus n- sp.— Rather elongate; sides parallel; body depressed, 

 black; legs and antennae pale, dusky yellow; pubescence rather long, recum- 

 bent, not very dense; integuments shining. Head large, triangular, slightly 

 wider than long; eyes large, strongly convex, prominent, coarsely setose; 

 surface feebly conavex, smooth, obsoletely and finely reticulate; labrum prom- 

 inent, acutely rounded; second joint of antennae distinctly shorter than the 

 first, both rather slender and elongate. Prothorax as long as the head, very 

 slightly wider, three-fourths wider than long, widest in the middle; sides 



