THE PINE INVESTIGATION. 357 



numerous trees that were being felled for saw logs, and thus 

 the living timber had escaped. 



OBSERVATIONS IN THE MAYFIELD HILL GROVE. 



This place was visited on Oct. 22d, where the turpentine 

 bark beetle was found to have developed broods in the trees 

 attacked during the spring and summer. In one interesting 

 case a brood was found under the bark on a root six inches 

 below the surface of the ground. They had recently changed 

 from the pupae, but had not matured sufficiently to come out. 

 It was quite evident that they would not have matured suffi- 

 ciently to emerge before cold weather, and would have doubt- 

 less passed the winter in the position they were found, had 

 they not been disurbed. 1 



The same Hylastes (Hylastes cavernosus) was found here as 

 in the white pine in Raleigh. It was common in the bark of 

 roots of trees that had died last spring where it had evidently bred. 



No trees in this grove had died recently, and a number that 

 had been invaded by the destructive bark beetle in the fall of 

 1892 had, to all appearances, entirely recovered. 



This ended my observations with reference to the pine and 

 spruce in 1893, and in reviewing what I had recently found, I 

 was ready to change my opinion, which I had previously held, 

 about the destructive powers of the turpentine bark beetle 

 (Dendroctonus terebrans), Tomicus pini and Tomicus caelatus, 

 and had it not been for occasional rumors of new outbreaks of 

 the trouble in different sections of the State, 2 1 would have been 

 ready to conclude that the trouble was at an end. In fact, so far 

 as the destrucive bark beetle being concerned in a continuation 

 of the trouble, I was well satisfied that nothing was to be feared. 



CONDITIONS IN 1894. 



The first observations made in 1894 was on April 13th while 

 in Doddridge county, near Central Station, where I found a 

 small dying scrub pine which was infested by a small bark 

 beetle (Pityophthorus pullus] which was entering the bark and 



1 Anew enemy of this insect was found here, namely, larva of an Elatrid beetle which 

 was observed feeding on the pupae. 



2 These reports referred to trees that were dying from previous injuries, as was sub 

 sequently determined. 



