386 SCOLTTID^:. 



[LeConte. 



fying tlie species as here defined, would have almost equal difficulty, if the 

 specimens in my collection were before him. 



6. D. brevicomis, n. sp. 



Elongate-cylindrical, red-brown, with a few long hairs on the prothorax, 

 and numerous very short ones on the elytra. Head large, finely not densely 

 granulate, rugose, occiput nearly smooth, face with an interrupted longi- 

 tudinal impression, antennae with circular compressed club, sutures trans- 

 verse, funicle 5-jointed. Prothorax at base nearly twice as wide as long, 

 as strongly bisinuate as in D. frontalis; very slightly narrowed towards the 

 tip, and slightly constricted ; punctures small, not dense, surface shining, 

 with no trace of a dorsal line. Elytra opaque, striae indistinct, composed 

 of not very evident punctures ; surface finely densely granulate, becoming 

 punctulate on the declivity ; in other respects it resembles the other species 

 of the genus. Length 4.2 mm. ; .17 inch. 



One specimen ; Middle California. Intermediate in form of prothorax 

 between the next and the foregoing species, but strikingly different from 

 both by the sculpture and pubescence of the elytra. 



7. D. frontalis Zimm., Tr. Am. Ent. Soc. 1868, 149 ; (synon. excl). 

 Lake Superior to Georgia. The head is channeled and marked with 



approximate frontal tubercles ; the occiput is finely punctulate, the front 

 roughly punctured as usual. The interspaces of the declivity of the elytra 

 are finely asperate, and the hairs are short. The prothorax is scarcely 

 narrowed in front, and the base is more strongly bisinuate than in the other 

 species. The club of the antennas is round, strongly compressed and con- 

 cave on one side, as in the other species; and the sutures are not straight, 

 but curved. Length 3 mm. ; .12 inch. 



The frontal channel is deeper, and the granulate punctures larger, and 

 denser in one sex than in the other. 



Dr. Zimmermann cites as a synonym Bostrichus frontalis Fabr., Syst. 

 El. ii, 389 ; the description appears to me not to correspond, and I have 

 cited it above as pertaining to Phloeotribus frontalis, (p. 377). 



BLASTOPHAG-US Eichhoff. 



This genus does not properly belong to our fauna, and I mention it only 

 for the purpose of correcting the error, which I committed of describing 

 an accidentally introduced specimen of the common European B. piniperda 

 under the name Hylurgus analogus, Tr. Am. Ent. Soc. 1868, 172. The 

 last mentioned name must therefore be erased from our list. I also com- 

 pared it with the European IL ligniperda on the authority of an incorrectly 

 named specimen which I borrowed for comparison. If the genus should 

 hereafter occur in our fauna, it can be easily recognized by the outer part 

 of the funicle of the antennae being divided into 5 joints, thus making the 

 funicle 6-jointed, and by the club being ovate-pointed, not compressed, 

 transversely annulated, with the joints smooth and shining, fringed with 

 hairs. The beak is somewhat more distinctly developed than in Dendroc- 

 tonus, and the antennal grooves- are wider and deeper. 



