106 GEO. H. HORN, M. D. 



Joints 2 — 3 of antenuse very little shorter separately than the fourth, together 

 always longer than the fourth, the third a little longer and more 

 slender than the second. 

 Bides of thorax very distinctly explanate, species bicolored, thorax reddish- 

 yellow, elytra piceous or hlack COllai'is. 



Sides of thorax not or very feebly explanate, body above uniform in color 

 but variable from piceous to testaceous. 

 Thorax more densely punctured at the sides than at middle. 



Form regularly oval. Elytra 9 not impressed variabilis. 



Form oblong. Elytra 9 bi-impressed impressns. 



Thorax not more densely punctured at the sides. 

 ' Form oval, moderately convex |>atli. 



C. robustus Lee. — Oblong oval, brownish, moderately shining, sparsely 

 clothed with short, suberect pubescence. Head moderately punctate. Antennae 

 as long as half the body, piceous, three basal joints paler, joints 2 — 3 small, 

 equal in length, the third a little more slender, the two together nearly equal 

 to the fourth. Thorax a little more than twice as wide as long, when viewed 

 from above nearly semicircular, apical margin concealing the head, lateral 

 margins explanate and slightly reflexed, disc sparsely, sides a little more 

 densely punctate. Elytra not wider at base than the thorax, sides moder- 

 ately arcuate broader at middle, disc rather coarsely and moderately densely 

 punctured, a vague sutural stria and three feeble traces of costas. Sides of 

 metasternum densely punctulate. Abdomen densely and finely punctulate 

 over its entire surface. Length .20 inch; 5 mm. 



This species bears a certain resemblance to Microcara explanata, 

 but is easily known by its generic characters. 



New York, Mr. Ulke. 



C ruficollis Say. — Oblong oval, piceous, thorax variable in color from 

 red to piceous, surface finely pubescent. Head scarcely punctate. Antennae 

 piceous, three basal joints pale, joints 2 — 3 short, scarcely longer than half the 

 fourth, the third much smaller than the second. Thorax nearly three times 

 as wide as long, slightly narrowed in front, sides moderately arcuate, apex 

 feebly emarginate, base bisinuate, margin very feebly explanate, surface 

 sparsely punctate and a little more coarsely near the sides. Elytra a little 

 wider than the thorax, coarsely and moderately densely punctured, form 

 oblong, sides parallel. Body beneath finely, moderately densely punctured. 

 Length .14 — .16 inch ; 3.5 — 4 mm. 



The thorax varies in color from rufous to piceous, the intermediate 

 forms having the middle more or less piceous while the sides are 

 more or less broadly rufous. 



Occurs from New York to Georgia and Kansas. 



C. brevicollis Lee. — Oblong oval, brownish testaceous, sparsely clothed 

 with yellowish, silken pubescence. Head not densely punctate, a vague im- 

 pression each side above the base of the antennce. The latter a little longer 

 than half the body, second and third joints small, about equal in length, the 

 third a little more slender, the two together shorter than the fourth. Thorax 

 nearly three times as wide as long, slightly narrowed in front, sides feebly 



