416 



WEST VIRGINIA EXPERIMENT STATION. 



LXXV, c. It does not seem possible that Harris would have 

 overlooked this character, so that we either have two species 

 which can only be distinguished in the larva stage, or Harris 

 had the larva of some other insect before him. Probably that 

 of Hylurgops pinifex which has 

 somewhat similar habits and is 

 often associated with it. 



Pupa. While I have frequent- 

 ly observed the pupa, and reared 

 it from larva, I failed to describe 

 it frpm fresh specimens, and I 

 believe that it has not been de- 

 scribed. It jis of the size and 

 form of the adult, and transforms 

 within the brood galleries. I 

 have never observed it in chip co- 

 coons in the surface of the wood 

 as mentioned by Packard. 1 



HABITS AND LIFE HISTORY. 2 



The hibernating adults com- 

 mence to fly in the latitude of 

 Morgan town, W. Va., as early as 

 April 20th. It is evident there- 

 fore, that the hibernating adults ". tibia: 6, tarsus. 

 have all emerged by the 10th of May. The adults from hiber- 

 nating pupae, and larvae appearing: later. 



As previously noted on page 346, this insect sometimes oc- 

 cur in great migrating swarms soon after it emerges from its 

 winter quarters. During this swarm period, and doubtless at 

 other times, it is attracted to freshly painted buildings and to 

 furniture shops, freshly sawed pine lumber, etc., by the odor of 

 turpentine. 



Unlike its relative, the destructive bark beetle, this species 



1 5th Rep. U. S. Ento. Com. p. 721., evidently refers to a curculioned larva possibly 

 Pissodes sp. 



2 There are doubtless varieties, races, and species in other sections of the country 

 heretofore recognized as D. terebrans, which will be found to have different habits from 

 the common form referred to in this report. 



Fig. 1 LXXlV--Dendroctonu8 terebran s 



