380 SCOLYTID^. 



[LeConte. 



has a very narrow smooth lougitucjinal line. The specific name is badly- 

 chosen, as it is only in partially abraded specimens tliat the muricate punc- 

 tures of the interspaces of the elytra can be seen. 



3. H. fasciatus Lee, Tr. Am. Ent. Soc. 1868, 170. 



One specimen, York county, Pa. A small species of stouter oval form, 

 with the club of the antennte thicker, less elongate, and corneous and 

 shining at the base. Length 1.5 mm. ; .06 inch. 



4. H. sericeus Mann., Bull. Mosc. 1852, 385; Hylurgus ser. Mann., 

 ibid, 1843, 296 ; ibid, 1852, 356. 



Var. H. neb'uloms Lee, Proc. Ac. Nat. Sc. Phil. 1859, 285. 



Alaska to California. Length 3 mm.; .12 inch. The outer interspaces 

 of the elytra are marked with a row of small acute tubercles. The bristles 

 of the elytra are longer in the type than in the variety, and the sides of the 

 prothorax seem a little more rounded, but otherwise there is no special 

 difference. The elytra are not banded as in the preceding species, but 

 confusedly tesselated. I observe no sexual characters, and the front is 

 finel}' carinate in the four specimens examined. The head is more prolonged 

 than in the other species. The club of the antennne is subovate pointed, 

 about twice as long as wide, annulated with straight sutures. 



5. H. opaculus Lee, Tr. Am Ent. Soc. 1868, 170 ; Phlceosinu.s j;. liini- 

 naris % Chapuis, Mem. Soc. Roy. Sc. Liege, 1869, 39. 



Middle States. This species has a deceptive resemblance to Phlmotribus 

 frontalis, and it is only by examining the antennte that it may with cer- 

 tainty be separated. The reference to the genus Phheosinus is incorrect, 

 as the outer part of the tunicle is divided into six joints by five transverse 

 sutures, precisely as in the other species of Ilylesinus. The club is sub- 

 ovate, obtusely pointed, with straight sutures, and the basal part is more 

 shining and less pubescent than usual. Length 2-2.5 mm. ; .08-10 inch. 



6. H. aspericollis n. sp. 



Cylindrical, rather elongate, blackish-brown, thinly clothed with fine 

 short pubescence. Head sparsely punctured, with a faint frontal impres- 

 sion, and an indistinct smooth median line. Prothorax at base scarcely 

 wider than long, slightly rounded on the sides, gradually narrowed in 

 front, but not constricted, nearly truncate at base and apex, finely and 

 densel}' punctured, sparsely but strongly asperate, with acute tubercles at 

 the sides. Elytra with punctured strife, interspaces moderately convex, 

 granulato-rugose, and muricate with acute small spines becoming more 

 prominent on the declivity. Antennse ferruginous, with seven distinct 

 joints in the funicle ; club oval-pointed, transversely annulated as usual ; 

 front tibife rather suddenly dilated at the tip. Length 2.5-3.4 mm. ; .10- 

 .13 inch. 



California, (at Santa Barbara?); Mi*. Crotch; several specimens, in 

 which I observe no special sexual differences, except that in some the frontal 

 impression is a little deeper. It is similar in form to //. opaculus but 

 larger, with the pubescence much finer and inconspicuous. 



