AMERICAN COLEOPTERA. 43 



appear to be dentella, and the form sinuata which I have 

 placed somewhat doubtfully as a variety of belfragei. The 

 former agrees best in ungual formation, but is a somewhat 

 smaller species with less coarsely and densely punctate thorax, 

 and the elytral punctuation more regular. Its habitat, the 

 mountains of southeastern Arizona, is also sufficiently dis- 

 tant from the Salt Lake basin to make the identity of the two 

 forms at least questionable. Sinuata is nearer insigjiis in size 

 and sculpture, but the ungual tooth is less strictly median, its 

 outer edge more oblique basally, the thorax less transverse, 

 and the clypeus more deeply emarginate. LeConte very 

 properly compares insignis with haydenii, with which it is in 

 accord in ungual dentition and in the form of the mentum; 

 it is, however, a larger species than haydenii, the head and 

 thorax much more coarsely and closely punctured, the hind 

 angles of the latter less obtuse and more sharply outlined. 

 The cicatrix of the terminal joint of the maxillary palpi is 

 distinctly eroded or impressed in the type, not at all or 

 scarcely so in haydenii or in the other allied forms; it is quite 

 possible, however, that this character will not prove constant. 



29. D. belfragei n. sp. 



Moderately robust, a little wider posteriorly, black or ferruginous, 

 moderately shining, the elytra with minute alutaceous sculpture. 

 Mentum declivous both before and behind from about the middle, 

 the posterior declivity feeble and broadly flat or subconvex, the 

 anterior declivity more pronounced and broadly concave from side to 

 side; the transverse arcuate convexity without raised line or erect 

 setse. Front and clypeus in same plane, post-clypeal convexity ob- 

 solete; clypeal suture sharply defined but not deep; punctuation close 

 and moderately coarse, the punctures a little less approximate on the 

 vertex, but distant there by less than their own diameters; clypeal 

 margin feebly sinuate at middle with rounded angles. Prothorax 

 three-fourths wider than long, sides broadly arcuate, subparallel 

 toward the base, without sinuation in typical form; hind angles sharply 

 defined, slightly obtuse when viewed from above; angles not appre- 

 ciably impressed; punctures separated on the average by their own 

 diameters or a little less, somewhat sparser at middle. Elytra a little 

 more than one-fourth longer than wide, and slightly more than two 

 and one-fourth times as long as the prothorax; discal costas very dis- 

 tinct, intercostas rather broad and confusedly punctate, the first three 



TRANS. AM. ENT. SOC, XXXV. FEBRUARY, 1909. 



