258 GEO. H. HORN, M. D. 



narrower in front, sides arcuate, apical and basal angles rounded, base feebly 

 arcuate, surface densely punctured, feebly shining. Elytra very little wider 

 than the base of the thorax, oblong-oval, narrower behind, sutural stria moder- 

 ately deeply impressed, surface without trace of striae, moderately closely punc- 

 tate. Body beneath finely punctate. Legs piceous or brownish. Length .16 — 

 .18 inch; 4—4.5 mm. (PI. V, fig. 17). 



la both sexes the aaterior femora are flattened on the under 

 edge and feebly punctate, the male has usually a small tubercle 

 also at the middle, but this does not seem constant or at least 

 very evident in all specimens. The anterior tibiae in both sexes 

 are simple. In the male the anterior tarsi are rather broadly 

 dilated and the first joint of the middle twice as stout as the 

 second. In the female the ventral segments 3 — 6 are foveate at 

 middle, vaguely in the first two, more distinctly in the last two 

 segments. 



This species has almost exactly the form of hasillaris as well as 

 the color, but is known by the form of the femora and the sexual 

 characters. Specimens occur with the elytra darker in color with the 

 surface having a fuliginous lustre. 



Occurs from Alaska to Oregon, and New England States. 



C. simplex Say, {Catops). — Oval, slightly oblong, piceous or brownish, 

 elytra very little paler, surface pubescent. Head moderately densely punctate. 

 Antennae piceous, two basal joints paler. Thorax about one-half wider than 

 long, a little narrowed in front, sides moderately arcuate, anterior angles 

 rounded, basal angles obtuse, base feebly arcuate, surface densely and rather 

 finely punctate. Elytra scarcely wider than the thorax, more narrowed behind, 

 sutural stria moderately impressed, surface not striate, moderately densely 

 punctate. Body beneath and legs moderately densely punctate. Length .14 — 

 .16 inch; 3.5 — 4 mm. 



The anterior femora are distinctly flattened beneath and in the 

 male with a distinct tubercle at middle. The anterior tarsi of 

 the male are moderately dilated and the first joint of the mid- 

 dle tarsus distinctly thickened. The anterior tibiae are simple in 

 both sexes, not sinuate. The ventral segments are simple in both 

 sexes. 



This species is less elongate than luridipennis and more nearly 

 resembles in form clavicornis. 



Widely distributed in the central portion of the Atlantic region. 



C. basillaris Say, {Catops). — Oblong moderately elongate, pieeous, elytra 

 paler at base piceous at apex, surface pubescent, moderately shining. Head 

 moderately densely punctate. Antennae piceous, two or three basal joints 

 paler. Thorax more than half as wide as long, slightly narrowed in front, 

 sides moderately arcuate, anterior angles rounded, basal angles obtuse, base 



