206 BIOLOGICAL BUBVB1 OF 



CRYPTOEHYNCHU8 [lligei 



( '. LAi'Min (Linn.) (171)74). The Willow Borer is an intro- 

 duced Bpecies firsl noted in U. S., 1882. Attacks willow, 

 poplar, and other ornamental trees. Of general distribu- 

 tion. The adults puncture the bark, gouging the cambium 

 layer, while the young, which hatch late in the summer, pene- 

 trate the cambium layer in which they hibernate, pupating 

 in the older wood, and emerging the following Spring. 

 Beared from willow as late as July 17. 



Phloeophagik Schonherr 



P. apionides Horn. (18047). Corfield under maple bark, 

 July 7. 



Rhyncolus Germar 



R. brunneus Mann. (18070). On cedar stump, dime 27 

 (Br.). 



Sphenophoki s Schonherr 



S. costipennis Horn. (18114). Breeds in the roots of grass- 

 like plants. Wet meadow south of Penikese, July 14. Scarce. 



Scolytidae. The Bark Beetles 



These are to be found in dead trees. Caging dead limbs is 

 an easy way to collect them. Pry bark from stumps. 



NcoLYTUS Geoffroy 



S. rugulosus Ratz. (18171). Beaten from wild cherry in 

 Eden Graveyard. 



Ckypturgus Erichson 



C. atomus Lec. (18188). This species appears in spruce 

 stumps about 18 months after the tree is felled. Penikese 

 in Aug. 



Polygraph is Erichson 



P. rufifennis (Kby.) (18193). The Spruce Bark Beetle. Il 

 infests dying and felled spruce. N. E. Harbor; S. W. Har- 

 bor, June. 



