[537] COLEOPTERA 185 



Family SCOLYTIDjE. 



Hylurgops rugipennis Mannerheim. 



Farragut Bay, June 5, 1 specimen; Sitka, June 16, 3 specimens. 



Dendroctonus obesus Mannerheim. 



Sitka, June 16, 3 specimens. This is probably specifically differ- 

 ent from D. rujipennis Kirby and confined to the northwestern region 

 of North America. The precise distribution cannot be given at 

 present. 



Pityophthorus nitidulus Mannerheim. 



Sitka, June 16, 1 specimen. 

 Dryoccetus autographus Ratzeburg. 



Sitka, June 16, 1 specimen; Yakutat, June 21, 10 specimens. 

 Xyloterus bivittatus Kirby. 



Sitka, June 16, 4 specimens. 



