356 WEST VIRGINIA EXPERIMENT STATION. 



OBSERVATIONS IN RALEIGH COUNTY. 

 WHITE PINE. 



This section was visited on Oct. 6th, - 7th, where the condi- 

 tions were found to be slightly changed from that of the pre- 

 vious May. Very few trees had died since then, and al- 

 though the turpentine beetle had developed broods in the liv- 

 ing and injured trees, no serious damage had resulted ; in fact, 

 the healthy ones that were attacked in May by such numbers 

 of this species as to make it seem impossible for them to re- 

 cover, were found at this time to be apparently as healthy as 

 they were previous to the attack. This bark beetle was also 

 found in all stages of development in the bark of stumps of 

 recently felled trees, and in one case a recently developed 

 brood had died, apparently from a disease. Broods were not 

 developed in all of the living trees attacked, since a great many 

 trees were found which had been abandoned by the beetles 

 apparently before eggs were deposited. 



Two of the surviving species (Tomicus pini and Tomicus 

 caelatus} were found to be exceedingly abundant,especially the 

 latter, which occurred in all stages in the tops and logs of trees 

 that had been felled during the previous spring. They were 

 attacking the bark of recently felled trees, but not at this time 

 so far as I observed, attacking living trees, or even those in 

 which broods of the turpentine beetle had developed. 



Another bark beetle (Hylastes cavernosus, Zimm), which 

 had not been previously noted in the white pine was common, 

 mining in the living bark on the roots of stumps of recently 

 felled trees. Eggs occurred in their mines in considerable 

 numbers, but no larvae were found. 



Contrary to my expectations the conditions here were quite 

 encouraging. The living timber had not been injured by the 

 invasion of the turpentine bark beetle (Dendroctonus tere- 

 brans) and the two other common bark beetles (Tomicus pini 

 and lomicus caelatus) which it was feared during the previous 

 May would attack the living and injured trees, had not done so. 

 They had evidently been attracted to the tops and logs of the 



