188 H. C. FALL. 



This species is very closely related to the European pertinax Linn. 

 In specimens of the latter sent by Reitter, the ninth joint of the 

 antennae is slightly longer than the three preceding, and the elytral 

 interspaces are wider and nearly flat. 



3. C. quadrulus Lee. — Moderately robust, dark brown, with fine sparse 

 appressed pubescence, which becomes a little longer and paler in the posterior 

 thoracic impressions. Ninth joint of antennae equal in length to the three pre- 

 ceding. Head and prothorax of the form and sculpture common to the genus. 

 Prothorax as wide as the elytra, sides not sinuate before the hind angles which 

 are a little obtuse; disk feebly concave at middle. Elytra with regular striae of 

 quadrate punctures, the intervals scarcely wider than the striae and usually very 

 slightly convex. Beneath sculptured as usual in the genus; the last ventral 

 broadly concave at middle, nearly or quite throughout its length, the concavity 

 becoming deeper posteriorly. Length 4.3-5.6 mm. 



This species ranges from the middle Sierras of California to Brit- 

 ish Columbia. I have seen specimens from Kaweah, California 

 (Hopping) ; Lake Tahoe (both in California and Nevada) ; Oregon ; 

 Ten i no, Washington, and Vancouver and North Bend, British 

 Columbia. 



4. C. alternatus n. sp. 



Nearly identical in form, size and sculpture with quadrulus, the 

 only noteworthy differences being those given in the table. The 

 suberect recurved hairs which are intermixed with the appressed 

 pubescence are very short but are distinctly visible in profile with a 

 good lens. 



Three examples only have been seen; one from Colorado in the 

 Horn collection, the other two taken by Cockerell in New Mexico 

 (Wootens and "eight miles above Mora"), and now in my collection. 



5. C truncatus a. sp. — More elongate and smaller than quadrulus; color 

 varying from red-brown to dark brown ; pubescence completely appressed. Pro- 

 thorax scarcely as wide as the elytra at base ; ninth joint of antennae equal to the 

 two preceding joints, fourth to eighth distinctly triangular (trapezoidal or sub- 

 quadrate in the preceding species) ; thoracic disk scarcely or very feehly concave 

 at middle; elytral interspaces nearly fiat and wider than the striae, the apex dis- 

 tinctly truncato-emarginate ; other characters nearly as in quadrulus. Length 

 3-4.5 mm. 



Specimens before me are from Lake Tahoe, Nevada, and Califor- 

 nia (Hubbard and Schwarz); Oregon (Koebele) ; Eastern Wash- 

 ington (Koebele) ; Tenino, Washington, and Vancouver, British 

 Columbia (Hubbard and Schwarz). 



An example in the Horn collection from Colorado seems scarcely 

 different and is referred here. 



