NORTH AMERICAN COLEOPTERA. Ql 



15. i\ dolata u. sp. — Form rather broad, as depressed as in dentipes, color 

 piceous or nearly black, with faint bronze lustre, beneath cupreous; antennfe 

 cupreous, gradually more slender to the tip, the third joint a little longer than 

 the next two ; front ( 9 ) cupreous, coarsely and closely punctate, with two cal- 

 losities at middle ; clyiseus (72) with a triangularly oval emarginatiou at middle 

 on each side arcuate ; thorax twice as wide as long, sides strongly arcuate near 

 the front angles then feebly arcuately narrowing to base ; disc feebly convex 

 not sulcate at middle, a moderately deep crescentic depression each side, an ob- 

 lique depression near the apex, a feebly elevated ridge near the sides, surface 

 very densely, rather coarsely punctate, the punctures slightly transversely con- 

 fluent ; elytra wider than the thorax, rapidly narrowed at apical third, the mar- 

 gin serrulate, the apices obtuse ; disc with the first costa entire, the second and 

 third interrupted and transversely confluent into large, smooth, elevated spaces, 

 the fourth costa fine and submarginal, the intervals very densely i)unctured and 

 opaque ; body beneath cupreous, moderately closely punctate ; prosternum not 

 lobed in front, coarsely and closely punctate 9 ; la^^t ventral segment with ser- 

 rulate margin ; anterior femur with moderately strong, serrulate tooth. Length 

 .46 inch; 11.5 mm. (Fig. 71.) 



Male. — Unknown. 



fema/e.— Anterior and middle tibise feebly arcuate, the posterior straight; last 

 ventral segment (73) very feebly emarginate at apex ; last dorsal sparsely punc- 

 tate, acutely notched at apex. 



Not having the male of this species its position in a tabular ai'- 

 rangenient is somewhat uncertain, but the absence of prosternal lobe 

 restricts its position between those in which the male have a tibial 

 tooth or those with an apical dilatation. The form of the thorax, 

 the emargination of the clypeus and the peculiar elytral sculpture 

 will make it recognizable. The contrast on the elytra between the 

 elevated smooth spaces and the densely punctured intervals is very 

 striking. 



Occurs in California, Nevada and Oregon, and is thus far rare. 



16. C dentipes Germ.— Form moderately elongate, depressed, color dark 

 bronze, either brownish or piceous, very feebly shining : antenuie more slender 

 externally, joint three nearly as long as the next two, joints four to eleven in 

 great part testaceous ; front flat and densely punctured, without distinct callosi- 

 ties % , or slightly convex, irregularly, coarsely punctured, with more or less 

 distinct callosities 9 ; clypeus (76) rather broadly, triangularly notched at mid- 

 dle, on each side rounded ; thorax nearly twice as wide as long, broadest one- 

 third from apex, the sides posteriorly slightly sinuate and gradually narrowed 

 to base ; disc moderately convex, a broad median sulcus wider in front, limited 

 on either side by a more elevated smoother space, between which and the margin 

 the surface is irregular; surface densely punctate and at sides confluent; el;si:ra 

 wider than the thorax, nearly parallel, obliquely narrowed at apical third, the 

 margin feebly serrate, the apices separately obtuse ; disc rather flat, the fir.st co.sta 

 distinct at apical half terminating in front in a vague, smooth space, the other 

 costa^ replaced by broad smoother spaces of irregular shape, the surface between 

 very densely punctured, the basal fovea moderate ; body beneath cupreous. 



