1879.] oJo [Horn. 



C. sqiiaimilosus Lee. 



Brownish or piceous, moderately shining, sparsely clothed with very 

 short inconspicuous pubescence. Head coarsely and densely punctured, 

 vertex convex, clypeus arcuate in front, sides broadly rounded, margin 

 reflexed. Mentum plate deeply concave, posterior margin acutely incised. 

 Thorax broader than long, sides rather irregular, usually diverging at 

 apical third, then parallel at middle, in front of hind angles suddenly but 

 not greatly narrowed, anterior angles scarcely more prominent than the 

 margin, nodiform, smooth, limited within by a rather deep depression and 

 posteriorly with a very faint groove, hind angles triangular, not very 

 prominent, feebly punctate and separated from the disc by a deep oblique 

 impression, disc of thorax slightly convex, coarsely and very regularly 

 punctate. Elytra slightly convex, surface coarsely, deeply and rather 

 closely punctate. Pygidium coarsely and densely punctate. Body be- 

 neath coarsely but not closely punctate. Legs ambulatorial, tibise stout, 

 the anterior bidentate near the tip, the middle and posterior with a slight 

 oblique ridge at middle. Tarsi as long as the tibise, rather slender and 

 feebly compressed. Length .36-. 40 inch ; 9-10 mm. 



The notch in the margin of the mentum plate varies in 

 extent, sometimes being very slight, but usually extending 

 through the reflexed edge. 



With this species must be united junior Westw. 



Occurs in Georgia and Florida. 



C. canaliculatus Kby. 



Black, feebly shining. Head densely punctured, front convex, clypeus 

 arcuate in front, lateral angles broadly rounded, margin reflexed. Mentum 

 plate deeply concave, side and posterior margin very widely reflexed, 

 deeply emarginate posteriorly. Thorax one-third wider than long, sides 

 moderately arcuate and slightly coarctate in front of the hind angles, ante- 

 rior angles obtuse, feebly prominent, limited within by a deep fovea, surface 

 continuous with the disc and punctured, hind angles triangular, punctured, 

 tip slightly turned outward, limited by a moderately deep groove, but not 

 depressed below the surface of the disc, disc slightly convex, coarsely and 

 densely punctured. Elvtra flattened on the disc, vaguely grooved, and 

 with shallow foveas moderately densely placed. Pygidium coarsely and 

 densely punctured. Body beneath densely and coarsely punctured, abdo- 

 men less densely. Legs as in nitens. Length .50 inch ; 12.5 mm. 



This species is known from castanece by the hind angles 

 being much less retracted and not depressed below the disc, 

 as well as by the form of the anterior angles. 



Occurs in Canada, Georgia and Illinois. 



C retractiis Lee. 



Resembles very closely the preceding species in form and sculpture, and 



