COLEOPTERA 



537 



Family SCOLYTIDvE. 

 Hylurgops rugipennis Mannerheim. 



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

 Dendroctonus obesus Mannerheim. 



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

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

 of North America. The precise distribution cannot be given at 

 present. 



Pityophthorus nitidulus Mannerheim. 

 Sitka, June 16, i specimen. 



Dryocoetus autographus Ratzeburg. 



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

 Xyloterus bivittatus Kirby. 



Sitka, June 16, 4 specimens. 



