NORTH AMKRICAN COLEOPTERA. 19 



20. t". Etlwardsii Horn. — Elongate, black, shining; elytra rerl, with suture 

 and apex more or less fuscous, pubescence fine, moderately dense. Antenna 

 slender, black, or with basal two joints and the bases of the other joints more 

 or less pale, a little longer than the head and thorax and stouter in the % , shorter 

 in the 9 , the joints twice as long as wide, second joint two-thirds as long as the 

 third. Head and thorax rather strongly punctulate, coarser punctures evident. 

 Thorax longer than wide, moderately convex, feebly channeled at middle, 

 broader in the 9) with the sides more strongly rounded, strongly narrowed in 

 front, moderately behind and feebly sinuate, hind angles sometimes divergent, 

 usually not, basal plicse long, basal lobe feebly, obtusely tridentate. Elytra con- 

 siderably wider than the thorax in the % , a little wider in the 9- sides rounded 

 and narrowed behind the middle to the tip. Body beneath punctulate, the 

 coarser punctures evident on the nietasternum and abdomen, but not on the pro- 

 sternum, or sides of prothorax, suhmarginal lines of prothorax long, prosternal 

 process stout, a little flexed upward, convex and not margined behind, hind coxal 

 plates but little narrowed externally, the angle rather broadly rounded. Legs 

 slender, black, or partly rufous ; tarsi slender, about as long as the tibi?e, first 

 joint of middle and hind pair longer than the last, the second about equal to it. 

 Length .34-.37 inch ; 8.5-9 mm. 



California, Nevada. Collections LeConte and Horn. 



Much larger than and quite different from the jireceding, which is 

 similarly colored. The tarsi are very similar to those of convexus 

 and allies, and the antennae in the S are almost equally slendei-. 

 8o far as observed the thorax is always distinctly much narrower in 

 the % . 



21. C". latiiiscillns Esch. — Very robust, obtuse before, acuminate behind, 

 black, opaque, clothed with fusco-cinereous pubescence. Antennte rather short, 

 serrate, barely equaling the head and thorax in length, joints 3 10 twice as long 

 as wide at tip; in the % the joints are less gradually dilated towards the tip. 

 Head and thorax densely strongly punctulate, with distinct, sparser, coarse punc- 

 tures intermixed ; thorax as wide as long, and as wide as the elytra, convex, lon- 

 gitudinally impressed at middle from near the apex, feebly on the disc to base; 

 basal plicpe long, median basal lobe not deeply bisinuate, sides strongly rounded 

 and narrowed in front, obliquely less narrowed behind, hind angles not or scarcely 

 divergent. Elytra subdepressed, sides rounded or subparallel, narrowed from 

 behind the middle to the tip, which is rather acute, strise scarcely impressed, the 

 seventh and eighth a little more distinctly so, punctures elongate, rather closely 

 placed, sometimes confluent; intervals flat, with coarse and fine punctures, not 

 den.sely placed. Body beneath finely punctulate, with sparser coarse punctures, 

 intermixed; propleurse a little more closely punctulate than the prosternum, 

 with the stronger punctures less evident, submari;inal lines reaching the middle 

 or beyond, prosternal process somewhat flexed, not margined behind ; hind coxal 

 plates not narrowed externally, angles rounded ; legs black, the middle and hind 

 trochanters beneath and knees usual rufesceut, tarsi piceous, rather thickly 

 spinous beneath, the first joint shorter than the last. Length .3-. 4 inch ; 7.5- 

 10 mm. 



