CoUopterological Notices, VII. 401 



surface even, without trace of impression. Elytra rather more than 3^ longer 

 than -wide, about % wider than the prothorax and more than twice as long, 

 oval, the sides evenly arcuate throughout; apex narrowly rounded; humeral 

 plica pronounced and somewhat elongate; subhumeral impression rather deep 

 and extending some distance from the base; two basal fovese moderate; sub- 

 «utural impressions, near the base, deep and distinct, the suture beaded thence 

 -to the basal margin. Legs well developed, the femora strongly clavate. 

 Xiength 2.0 mm. ; width 0.8 mm. 



Iowa (Keokuk). 



The type is a male, as shown by the acutely produced extremity 

 of the broad copulatory spicule. This species may be known by 

 its dark colors, elongate elytra, large size and some other features 

 as shown in the table. 



4. C. acutipenne n. sp. — Eather narrowly subrhomboidal in form, pol- 

 ished, subimpunctate, piceous-black, the elytra feebly rufescent; abdomen 

 •castaneous; legs and antennae dark rufous; pubescence abundant, stiff ante- 

 riorly, long, pale and quite dense on the elytra. Head nearly as long as wide, 

 semicircularly rounded behind the eyes, the latter moderate in size and rather 

 <;onvex ; neck % of the maximum width; occiput deeply vertical at base; 

 frontal margin truncate, the tooth narrow, elongate, with the tip bifid and 

 bearing a setiform hair. Antennse nearly % as long as the body, the eighth 

 joint rather abruptly wider than the seventh and the club almost parallel; 

 second joint feebly obconic, }4 longer than wide, almost as long as the next 

 two; three to six almost exactly equal, cylindric, slightly narrower than the 

 second and barely ,^4 longer than wide; seventh but little thicker, cylindric- 

 oval, % longer than wide; eighth wider, suboval, ^ longer than wide, equal 

 in length to the ninth, which is slightly longer than wide; tenth not longer 

 than wide; eleventh obliquely pointed, slightly stouter than the ninth and 

 tenth and distinctly shorter than the two together. Prothorax conic, slightly 

 longer than wide, the sides feebly arcuate; apex not at all tubulate, fully }4, 

 as wide as the base, which is about % wider than the head, surface perfectly 

 even throughout. Elytra rather more than }4, longer than wide, more than 

 twice as long as the prothorax and ^5 wider ; sides more strongly arcuate at 

 basal %, thence oblique and straighter to the apex, which is acutely rounded ; 

 humeral plica and impression somewhat short and feeble but distinct ; foveae 

 small and feeble; surface strongly impressed at the suture near the base, the 

 suture finely and moderately elevated basally. Abdomen densely fulvo-pubes- 

 cent. ie^^s rather long; anterior and middle femora strongly, the posterior 

 rather feebly, clavate. Length 1.8 mm. ; width 0.65 mm, 



Texas (Houston). 



Readily distinguishable by the elongate and acute elytra, which 

 are strongly impressed along the suture toward base. It resembles 

 longipenne, but is smaller, with the vestiture much denser and 

 ■differs greatly in the form of the clypeal tooth, which is simple, 



