THE PINE INVESTIGATION. 347 



greenhouses that were being constructed and painted at the 

 Experiment Station was one of the central points of attraction. 

 Here they occurred like swarms of bees. 



While this remarkable swarm consisted mainly of the turpen- 

 tine bark beetles, it would appear from the dead and living 

 examples that I found in the green-houses and adhering to 

 the paint, that it was accompanied by numerous species of bark 

 and timber beetles, and also by some of their enemies. 1 was 

 greatly disappointed that I did not see this swarm, or the many 

 others like it which I subsequently learned occurred in differ- 

 ent sections of the State about the same time, since it would 

 have been very interesting and important to know the number 

 of species that occurred in them and the approximate propor- 

 tions of each. 1 



On my way to the spruce forests on May 20th, I was informed 

 at Bretz, Tucker county, that the swarm had occurred there on 

 April 30th. They came from the southeast and "showered 

 against the windows like hail," and entered through the open 

 doors into the houses in such numbers that they had to be 

 swept out. I found a few examples ot the turpentine beetle in 

 the office of Mr. Shaw, who informed me that it was the same 

 insect that occurred in the swarm. At Mr. Frank Bennett's 

 about fifteen miles further up the river (Dry Fork of Cheat) 

 I learned that a similar swarm had visited that section about 

 the same time as the one at Bretz. Here i found large num- 

 bers of the turpentine beetle in the webs of the apple tree tent 

 caterpillar. The swarm that passed through Bretz and Mor- 

 gantown doubtless originated in the dead pine timber of Hamp- 

 shire, Hardy and Pendleton counties, and taking a north-west- 

 ernly course passed over the Allegheny mountains and through 

 the great spruce forests of Randolph and Tucker counties about 



1. The species found in the greenhouses and on paint which evidently came in the 

 swarm are as follows: 

 Species of Scolytids etc. in the swarm of May 4th, 1893. 



1. Monarthrum mali, Fitch. 



2. Gnathotrichus materiarius, Fitch. 



3. Xyleborus xylographus, Say. 



4. Tomicus cacographus, Lee. 



5. Hylastes cavernosus, Zimm. 



6. Hylastes gracilis. Lee. 



7. Hylurgops glabratus, Zett. 



8. Dendroctonus terebrans, Oliv. 



9. Ipsfasciatus, Oliv. 



