AMERICAN COLEOPTERA. 247 



39. C. porosum n. sp. — Brown, elytra feebly rufescent toward the apex, 

 very nearly three-fifths as wide as long, oblong-elliptical, slightly gibbous in pro- 

 file, pubescence moderate. Head densely not very finely punctulate, with 

 slightly larger intermixed punctures which are not very conspicuous. Pronotum 

 moderately punctate at sides; coarser punctures of elytra strong and rather 

 numerous, especially at the sides and apex. Metasternum very coarsely punc- 

 tured throughout, the punctures as close and as large at sides as at the middle. 

 Antennae and legs as in grave. Length 2.2-2.5 mm. 



Hab. — Florida (Capron, Crescent City and Tampa) ; Texas 

 (Columbus and Victoria). 



Closely resembles a small grave, from which it may be more 

 readily distinguished by the very coarse punctures of the metaster- 

 num, which are not finer and more distant at sides. ]n the Texas 

 example the coarser punctures of the head are large and conspicu- 

 ous, and those of the pronotum and elytra more numerous and 

 coarser still than in the typical form. It represents a well marked 

 geographical race at least. 



40. C. convexum n. sp. — Dark brown, pubescence short but moderately 

 plentiful. Rather robust, oblong-elliptical, almost three-fifths as wide as long, 

 strongly convex and very slightly gibbous in profile. Coarser punctures dis- 

 tinct, of nearly equal size and distribution throughout the elytra, moderate in 

 size and number at sides of pronotum, few and not couspicuous on the head. 

 Metasternum moderately punctate at middle, more finely and very sparsely at 

 sides. Eighth antennal joint about one-third longer than wide, subparallel 

 toward the apex, the angle nearly right. Front tibiae bisulcate; middle tibiae 

 with a fine but distinctly impressed marginal groove. Length 2.2-2.6 mm. 



Hab. — Lower California (Santa Rosa, Beyer) ; Arizona (one ex- 

 ample in LeConte cabinet). 



41. C castanenni Hamilton. — Eufocastaneous varying to piceous. Pubes- 

 cence of elytra excessively short and sparse, barely visible with a good triplet; 

 hairs of head and pronotum very fine and sparse but longer and more evident. 

 Form oblong-elliptical, distinctly more than half as wide as long, very feebly 

 gibbous in profile. Upper surface highly polished throughout; head minutely 

 punctulate; pronotum similarly finely sparsely punctulate at middle, the punc- 

 tures gradually larger to side margins; elytra without finer punctuation (excep- 

 tion noted below), the coarser punctures of good size, sparsely evenly distributed 

 on the disk, but showing a tendency toward a strial arrangement laterally, be- 

 coming confusedly serial in the shallow impressions or grooves, which continue 

 the lateral striae to the base. Metasternum very sparsely punctured at sides, 

 more closely at middle. Eighth antennal joint triangular and fully as wide as 

 long in the female, distinctly transverse and subquadrate in the male. Front 

 tibiae bisulcate; the posterior groove nearly complete ; middle tibiae not sulfate. 

 Length 1.5-2.5 mm. 



TRANS. AM. ENT. SOC. XXXI. JULY, 1905. 



