58 MEMOIRS ON THE COLEOPTERA 



margined throughout; the marginal gutter at the sides is very deep 

 and equal from apex to base, not expanding or becoming shallower 

 toward base, a very peculiar character of the genus; the elytra are 

 short, oblong-oval, not or but little wider than the prothorax, 

 rather coarsely and very deeply striate, with strong scutellar stria, 

 which is free and not united with the first stria and the surface is 

 completely devoid even of the single posterior puncture of Crato- 

 gnathus; the apical sinus, so universal in most of the Harpalinae, is 

 completely obsolete, not even a vestige remaining; the marginal 

 line of fovese is irregular and uninterrupted. The legs are rather 

 short, the femora slightly swollen, the tibiae slender and the tarsi 

 rather short, filiform and virtually similar in the sexes, the basal 

 joint of the posterior a little longer than the second. The claws 

 are only moderate in length, arcuate and slender, though gradually 

 somewhat thickened basally. The male has the elytra but little 

 longer than the head and prothorax combined in dubius, but in the 

 female they are distinctly less abbreviated. 



The species are closely allied among themselves and subject to a 

 good deal of variation in breadth of the body and relative width 

 of the anterior parts and elytra, but at the same time four seem to 

 be differentiable in the material at hand; these are as follows: 



Head moderate in size and in both sexes much narrower than the pro- 

 thorax 2 



Head very large, only a little narrower than the prothorax 4 



2 Elytra but little longer than the head and prothorax combined, 

 especially in the male. Body oblong, very convex, strongly shining, 

 black to piceo-rufous in color, always dark red-brown beneath, the 

 legs, antennae and mouth-parts rufous; antennae not extending to the 

 middle of the prothorax, rather stout, compressed, the joints rapidly 

 narrowed toward their bases; prothorax one-half widep than long, 

 sinuously narrowed basally, the base broadly and feebly sinuate 

 except at the sides, the apex subtruncate, finely margined near the 

 sides; surface smooth, with fine distinct biabbreviated median line 

 and completely obsolete transverse impressions, not at all flattened 

 postero-externally and without distinct foveae, but densely and 

 rather coarsely punctured in small basal patches corresponding to 

 the fovese; elytra a fourth (cf ) to two-fifths (9 ) longer than wide, 

 very broadly and obtusely rounded at apex, the smooth and polished 

 intervals distinctly convex. Length (cf 9 ) 7.5-9.8 mm.; width 2.8- 

 4.0 mm. New Jersey to Arizona. Twenty-one examples. [C. ameri- 

 canus Dej., bisectus Csy. (cf ) and litoreus Csy. (9 )] .dubius Beauv. 



Elytra much longer than the head and prothorax, apparently in both 

 sexes 3 



