Coleopterological Notices, VII. 423 



I have not been able to distinguish any sexual differences in 

 the specimens before me. This species is closely allied to humile, 

 but may be distinguished by its narrow form, sparser pubescence, 

 less developed humeral plica and impression, more slender an- 

 tennae and non-carinate clypeus. 



32, C angusticolle n. sp. — Moderately stout, the hind body somewhat 

 inflated, polished, impunctate, pale rufo-testaceous throughout, the elytra still 

 paler, the legs more luteous ; pubescence abundant but short, coarse and re- 

 curved on the elytra, where there are also longer sparse erect setse in addition, 

 pale in color. Head small, not quite as long as wide, almost semicircularly 

 rounded behind the eyes, which are distinct and rather convex ; clypeal tootb 

 very minute, narrow and acute, Antennts slender, much longer than the head 

 and prothorax, the club slender but rather abrupt and almost parallel ; second 

 joint nearly as long as, and but slightly narrower than the first, feebly obconic, 

 nearly % longer than wide and about as long as the next two ; three to six 

 equal in width and slightly narrower, cylindric ; third not quite as long as 

 wide ; fourth quadrate ; fifth and sixth equal and longer, }4 longer than wide; 

 seventh nearly J^ thicker than the sixth, not as long as wide, cylindric ; eighth 

 nearly }4 wider than the seventh, rounded apically, scarcely as long as wide • 

 ninth and tenth equal, slightly thicker, about }4 wider than long ; eleventh 

 unusually elongate, fully as long as the preceding two and rather thicker, 

 gradually and acutely pointed and but slightly oblique at tip. Prothorax 

 feebly conic, the sides virtually straight, as long as wide and apparently 

 longer ; apex % as wide as the base, the latter }^ wider than the head ; surface 

 transversely and distinctly impressed near the basal margin, the impression in- 

 terrupted at the middle as usual. Elytra % longer than wide, about twice as 

 long as the prothorax and fully ^5 wider, rather acute at apex and widest 

 near basal third ; sides evenly arcuate ; humeral plica strong, moderate in 

 length ; subhumeral impression large ; fovese distinct ; subsutural impres- 

 sions small but evident, oblique, the suture elevated near the base. Under 

 surface pale throughout, the abdomen more fulvous. Legs slender, the four 

 posterior femora feebly, the anterior more strongly, clavate ; tarsi slender. 

 Length 1.1 mm. ; width 0,45 mm, 



Texas (Colorado River). 



The antennal tubercles in this species are quite pronounced, andr 

 in the depression between them and at some distance behind the 

 line of the antennae, there is in the male a small elongate-oval area 

 which is finely and closely punctate. The description applies to 

 the male, but the female does not differ even in antennal structure. 

 Two specimens, 



33, C. frontale n, sp. — Eather narrowly subrhomboid-oval, polished 

 and impunctate, dark rufo-piceous in color, the elytra occasionally a little paler 

 and more rufous; antennae slightly, the legs much paler luteo-testaceous; pu- 



