52 H. C. FALL. 



40. D. densicollis n. sp. 



The distinguishing character of this species is the very 

 densely punctured and dull prothorax. The prothorax is im- 

 pressed along the posterior margin as in excavata, the sides 

 are sinuate before the hind angles and become also faintly 

 sinuate or subsinuate anteriorly. The punctuation of the 

 elytra is even a little denser, and the costse less evident than 

 in excavata or frontalis, but the difference is perhaps not 

 greater than may occur in individuals of those species. One 

 example in the Horn collection and two sent by Mr. Liebeck 

 — all from South Carolina — are all that I have seen of this 

 form, which as already indicated, may be an extreme variety 

 of excavata; as yet, however, nothing at all intermediate has 

 been seen. 



41. D. subangulata Lee. 



The unique type of this species differs from other specimens 

 associated with it in the LeConte collection and is not exactly 

 duplicated by any example in the very extensive material 

 studied. While possibly it represents a distinct species, I am 

 inclined to regard it as only an exceptional or perhaps a local 

 variety of the common and widely dispersed species, one form 

 of which has been lately described under the name californica 

 by Mr. Schaeffer, and from which the type of subangulata 

 differs as follows: 



The clypeus is less advanced, making the head seem more transverse; 

 the thorax is widest at middle, the sides more nearly equally con- 

 vergent before and behind, the base in consequence not much wider 

 than the apex, sides not at all sinuate before the angles; the post- 

 clypeal convexity is rather feeble with only faint impressions back of 

 it; the punctuation and claws are virtually identical with the ordinary 

 form. Length 8.5 mm. 



Hab. — Oregon. 



Var. californica Schaef. Dark brown or castaneous, more rarely 

 rufous or nearly black, shining, the elytra minutely alutaceous. Men- 

 turn feebly concave posteriorly, declivous in front, margin of declivity 

 acute and setiferous. Clypeal margin rather strongly reflexed, feebly 

 emarginate at middle, the angles rounded. Head densely punctate, 

 clypeal suture feebly impressed, smooth for a short distance near the 

 eyes; post-clypeal convexity strong, not or but slightly impressed at 



