24 FREDERICK BLANCHARD. 



The disc of the elytra is frequently broadly inijn-essed at middle 

 and less distinctly behind. Most nearly allied to ceneus, but not 

 bronzed, and a little less densely punctate, and the second joint of 

 the antennae is distinctly more than one-half as long as the third. 

 In one % the joints of the antennae are almost as gradually nar- 

 rowed as in the 9 • 



28. C3. jeneus Horn. — Form as in ohseurns, coppery or dull bronzed, clothed 

 with rather dense gray pubescence and suberect bristles. Antennse black, ser- 

 rate, second joint oue-half as long as the third, longer than the head and thorax 

 in the % and stouter, joints 3-6 broadest and about one-half longer than broad, 

 the outer joints gradually more slender. Head and thorax very densely finely 



kc . punctate, the usual coarser punctures evident, frontal margin depressed and very 



I tine at middle ; the thorax is convex, about equally broad as long in the % , wider 



' than long in the 9 , the sides strongly rounded and narrowed in front, obliquely 



less narrowed behind, sometimes feebly sinuate, impressed at middle behind and 

 at base each side, lobe tridentate the median tooth feeble, plicte distinct, mod- 

 erate. Elytra a little wider than the thorax, sides suhparaliel or feebly rounded, 

 subdepressed, punctate striate, with the strije occasionally interrupted, intervals 

 but feebly convex, usually densely punctulate. Body beneath more or less 

 bronzed, pale cinereous pubescent, strongly and rather closely punctulate, the 

 coarser punctures not very evident on the flanks of the pi-othorax, elsewhere 

 distinct, submarginal lines of prothorax well marked, usually broad and strongly 

 impressed and reaching in front of middle, prosternal ])rocess, moderately long, 

 more or less strongly ascending beneath, marginal lines absent behind the coxfe, 

 hind coxal plates slightly narrowed externally, the angles rounded. Legs 

 bronzed, black or piceous, with the knees, tips of tibife and of the tarsal joints 

 rufous, tarsi with the last joint longest. Length .27-. 37 inch ; 6.5-9.3 mm. 



California. In various collections. 



The distinctly bronzed specimens are easily recognized, but some 

 of the darker specimens might be confounded with obscurus. The 

 tendency of the frontal margin to he depressed has not been observed 

 in obscurufi. 



29. C robustus Lee. — Elongate, stout, or very stout in the 9 • clothed with 

 cinereous and brownish pubescence and bristles, legs rufous. Antennse black, 

 second joint short, joints 3-6 broader in the %, the outer graduiilly narrower, 

 two or three joints longer than the head and thorax, more slender and shorter 

 in the 9- Head and thorax strongly punctulate, the larger punctures rarely 

 evident, thorax convex, sides strongly rounded and narrowed in front obliquely 

 narrowed and sometimes feebly sinuate behind, feebly impressed at middle he- 

 hind and at base each side, lobe tridentate, median tooth distinct, basal plicte 

 short, distinct. Elytra a little wider than the thorax, sides subparallel or feebly 

 rounded in the ^ , ov gradually narrowed and rounded from in front of the 

 middle and strongly narrowed and rounded at tip in the % , stripe well impressed 

 at base, less strongly on the disc, punctate, intervals moderately or feebly convex, 

 punctulate. Body beneath strongly punctulate and i)ubcscent, the coarser i)unc- 



