THE PINE INVESTIGATION. 345 



feat for the Clerid. Two species of bark beetles were here 

 added to my collection that I had not previously taken. 1 They 

 were in the bark of the roots of living trees. 



The pine twig and bark curculio, Pissodes strobi, Peck, were 

 also taken and a chalcid 2 and a Bracon 3 parasite were subse- 

 quently bred from larve and cocoons taken in its larvae mines. 



CONDITIONS IN GREENBRIER AND POCAHONTAS COUNTIES. 

 WHITE PINE. 



Proceeding through Greenbrier into Pocahontas county on 

 the 1st and 2d of May, with Col. Driscol, of the St. Lawrence 

 Co., and Mr. Dixon, General Manager of the Cumberland Co., 

 the same conditions were found as noted in Raleigh county, 

 except that here more timber had died, having commenced in 

 1891. All the examples of the destructive bark beetles (D. 

 frontalis) whether larvae, pupa or adults, that I observed here 

 were dead, as they were in other localities. Many trees were 

 dying from previous injuries, but the trouble had not been very 

 greatly extended since I was here in July, 1892, and the pros- 

 pects were not nearly so gloomy as then. Enormous numbers 

 of the turpentine beetle, Dendroctonus terebrans, were entering 

 the bark at the base of the living trees in all parts of the forests 

 which made it appear at the time as if one trouble had ended 

 only for another to commence. The other common bark bee- 

 tles found in Raleigh county were also abundant here. 



The Cerambycid beetle (Asemum moestum), in the larvae 

 and pupae stage, was common in the outer heartwood of trees 

 killed by D. frontalis. A parasite ( Pimplid) of this species 

 was bred from cocoons taken in its pupa cases. Two Clerids 

 ( Trichodes simulator and Clerus quadriguttatus were taken 

 flying around a tree infested with Tomiouspinismd. T. caelatus. 



Upon an examination of the trees that had been dead one or 

 more years, it was found that they were not, as a rule very 

 seriously damaged by wood borers, with the exceptions of pin 

 holes in the sapwood. 



1 Hylastes tennis, Zimm, and Hylastes cavernqstts, Zimm. 



2 Eurytoma cleri, Ashm. 

 3Heydenia unica, C. & D, 



