NORTH AMERICAN COLEOPTERA. 255 



ately deeply impi-essed, except the four inner near the base, the punctures grad- 

 ually coarser near the apex and in the outer stripe, and very closely placed, in- 

 tervals flat, finely punctulate, toward the apex quite smooth, intervals 3-5-7-9 

 each with a row of coarse punctures. Body beneath piceous, opaque. Femora 

 piceous, opaque and pubescent, tibiaj and tarsi rufo-piceous. Length .18 — .22 

 inch.; 4 5 — 5.5 mm. 



Prosternum with a slight trace of a carina near the apex, mesosternura with a 

 short, feebly elevated transverse ridge slightly in front of the coxae. 



The claws are slender and simple in both sexes, and no character 

 has been observed by means of which the sexes may be separated, 

 except when the male oi'gan is protruded. 



Occurs ill California from Tejon northward, in Lake, Santa Clara 

 and Ahuneda Counties. 



C frsiterculus Sharp. — Oval, slightly oblong, moderately convex, piceous, 

 shining, entire border somewhat paler. Thorax closely punctate, a little more* 

 coarsely and less closely toward the sides, the arcuate and transverse rows of 

 coarse punctures distinct, basal marginal line absent. Elytra striato-punctate. 

 the strise being scarcely impressed, there being six or seven entire I'ows of punc- 

 tures, the inner rows gradually shorter toward the suture, the punctures of the 

 rows rather coarse and closely placed, intervals punctured similarly to the thorax, 

 but gradually finer and more sparse toward apex, the intervals 3-5-7-9 each with 

 a row of coarse punctures. Body beneath piceous, opaque. Femora piceous, 

 opaque and pubescent, tibiae brownish, tar.si paler. Length .18 — .22 inch. ; 4 5 — 

 5.5 mm. 



The prosternum is simple, the mesosternum with a slight elevation, which is 

 broadly conical when seen from in front, and A when seen posteriorly. 



Tarsal claws slender and simple, sexes not separable, except when the male 

 organ is visible. 



In this species there are always six entire rows of punctures, and 

 often a seventh continued by liner punctures to the base, the inner 

 strise are shorter. While the number of entire striae will readily dis- 

 tinguish the species, the most important character is found in the 

 elevation of the transverse ridge of the mesosternum m a short 

 conical process. 



Occurs in southern Arizona, extending southward well into Mexico. 



C'. doi'salis Motsch. — Oval, slightly oblong, scarcely narrowed in front, 

 moderately convex, piceous black, shining, entire border paler. Thorax finely 

 and rather closely punctate, the arcuate and transverse series composed of very 

 tine punctures. Elytra punctured similarly to the thorax, the punctures finer, 

 sparser and less distinct toward the apex, at the sides with five entire strise, which 

 are gradually more impressed toward the side, the punctures coarse, deep and 

 closely placed, especially externally, the inner strife short, composed of finer 

 punctures, the sutural stria deeply impressed, and extending three-fourths to 

 base, scutellar stria very faintly indicated, intervals 3-5-7-9 with a row of 

 coarser punctures faintly indicated. Body beneath piceous opaque. Femora 

 piceous, tibise and tarsi rufo piceous. Length .18 — .22 inch.; 4.5 — 5.5 mm. 



