110 GEO. H. HORN, M. D. 



C. Hnoxii, Lee. — Resembles littoreum in form, differs especially in colora- 

 tion as follows: Thorax testaceous, apical third or even half piceous. Elytra 

 testaceous, lateral margin narrowly, ajjical broadly piceous. Abdomen rufo- 

 testaceous, last three segments black. Body beneath piceous, abdomen beneath 

 as above. Legs and coxae testaceous. Length .12 — .14 inch; .3 — .3.5 mm. 



The elytral margin at ba.se has a very narrow piceous border which 

 rapidly becomes wider passing in a curved line to near the middle of 

 the suture. It is barely possible that this may be merely a variety of 

 the preceding. In both species there are two middle tibial spurs, one 

 femoral seta, and the last three segments of the abdomen are alone 

 setigerous. 



Occurs in Western Pennsylvania and Michigan. 



C. crassuni, Grav. — Pitchy black, robust, surface finely clothed with pale 

 brownish pubescence. Antennae as long as the bead and thorax, brownish 

 testaceous, apical joint paler. Head piceous, mouth paler, very sparsely punctu- 

 late. Thorax convex, sparsely pubescent and very finely and sparsely punctu- 

 late, sides regularly arcuate, base subsinuate on each side, hind angles broadly 

 rounded. Elytra as long as wide, slightly narrower at apex, base indistinctly 

 paler, surface denselj' and finely punctulate and sparsely pubescent. Abdomen 

 setigerous at the sides, sparsely punctured but more coarsely than the elytra, 

 sparsely pubescent, beneath as above. Body beneath piceo-rufous, sparsely 

 pubescent. Legs paler. Length .14 — .22 inch; 3.5 — 5.5 mm. 



This species is the largest and most robust in form. When mature 

 it is entirely unicolored above, when less mature the bases of thorax 

 and elytra are more or less reddish. In both sexes of this species the 

 middle and hind femora have three unequal bristles near the tip and 

 at the tip of the middle tibia the spinules ascend along the inner edge. 

 There is also but one spur, (fig. 33). 



This species occurs from Canada to the Gulf States. 



C. bisignatiiin, n. sp. — Black, shining, elytra with a well-defined sub- 

 basal red s])ot on each. Legs rufous. Antennae black, apical and three basal 

 Joints testaceous. Abdomen black, posterior margins of segments paler. Length 

 .14— .18 inch; 3,5—4.5 mm. 



The form is precisely that of crassum. the sculpture of the elytra 

 however a little finer and more dense. The abdominal segments have 

 bristles at the sides. The middle femora have th-ree unequal bristles 

 and the posterior, one near the tip. The middle tibiiB have the tips 

 fimbriate with spinules which do not ascend as in crasxum, and there 

 appears to be but one terminal spur. The two specimens before me 

 are in very fair condition but it is barely possible that there are nor- 

 mally two middle tibial spurs, in which case the species should be 

 placed near basale from which the larger size and well-defined sub- 

 basal red spot will distinguish it. 



Two specimens, Santa Barbara and Wilmington, Cal., G. R, Crotch. 



