382 SCOLYTID^. 



[LeConte. 



with a row of smaller tubercles in some specimens, but not in others. This 

 diflFerence is probably sexual. The head is granulato-punctate, and the front 

 is not carinate. 



4. P. punctatus, n. sp. 



This species precisely resembles P. dentatus in form, size and sculpture, 

 except that the striae of the elytra are wider, and strongly punctured; the 

 interspaces narrower, less densely granulated and rugose, and the second 

 interspace on the declivity is depressed, shining, sparsely punctured, and 

 narrower than the adjacent interspaces. The front is finely but distinctly 

 carinate. Length 2 mm.; .08 inch. 



Oregon and Lake Superior. 



P. Haagii Chapuis, Mem. Soc. Roy. Sc. Liege, 1869, 38; Dendroctonus 

 Haagii EichhoflT, Berl. Ent. Zeitschr. 1868, 148, may be synonymous with 

 this species, but I do not observe in the four specimens in my collection any 

 trace of the smooth dorsal line extending from the base beyond the middle, 

 as mentioned in Chapuis' description. Neither is the locality given, " Amer. 

 bor.," of much service in identifying the species in a genus where the 

 forms are so closely similar. 



P. graniger Chapuis, 1. c. 39, I am also unwilling to attach as a 

 synonym to any of the species above described; being from Texas it is 

 quite likely to be different. The descriptions of both these species will be 

 found in the appendix. 



CH^TOPHLCEUS n. g. 



This genus is founded upon Ili/lesinus hystrix, a singular species from 

 California, of robust oval form, thickly clothed with coarse, erect hair. It 

 differs from Phlesosinus by the four joints which constitute the outer part 

 of the funicle of the antenn?e being slender, and increasing much less rap- 

 idly in thickness; the club is equally large, subovate, compressed, obtusely 

 rounded at tip, and the sutures are also straight. The mouth is clothed with 

 long, coarse hair. The prosternum is very short in front of the coxje, which 

 are very narrowly separated. The first ventral segment is longer than the 

 second, and the third, fourth and fifth are short. The tibiae are broadly di- 

 lated, rounded and finely serrate at tip; the tarsi are not plainly visible in 

 the unique specimen in my collection, but the third joint is emarginate, 

 rather than bilobed. 



1. O. hystrix Lee, Pr. Ac. Nat. Sc. Phil. 1858, 81; Tr. Am. Ent. Soc. 

 1868, 171 {Hylesinus). 



San Diego, one specimen. The head is broadly concave, with a smooth 

 medial line. The prothorax is strongly and densely punctured. The elytral 

 striae are not impressed, and are composed of approximate punctures; the 

 interspaces are flat, punctured; the declivity is rounded, the part near the 

 suture is deeply and broadly concave, and the outer side of the concavity, 

 corresponding to about the fourth interspace, is armed with four or five tu- 

 bercles; the sutural interspace on the declivity is narrow, slightly elevated, 

 and marked with a row of very small granules. Length 3.2 mm.; .09 inch. 



