= 10.=— 
FOREST INSECTS 
F, C. Craighead, in Charge. 
Dr. T. E. Snyder left Washington June 8 to obtain a collection of 
termites from Dr. Alfred Emerson, of the University of Chicago. Dr. 
Emerson obtained a large collection of termites on his recent visit to 
European museums and exchanged many specimens for the Bureau of Entomology 
while on this trip. The present number of named termite species in 
the National Collection of Isoptera is 795, including 565 types of one 
kind or another. 
J. C. Evenden of the Coeur d'Alene, Idaho, field laboratory, re—- 
turned on May 23 from a two weeks' field trip on the bark-beetle control 
projects of Region Four. Control projects directed against outbreaks of 
the mountain pine beetle in lodgepole pine on the Targhee, Teton, Wyoming, 
Caribou, and Cache National Forests, and in the Yellowstone National Park 
are all well organized and for the most part will complete the operation 
by June 10. A marked reduction in the infestation followed last season's 
operation, and it is hoped that in many of the control areas this year's 
work will result in a clean-up of the infestation. 
Mr. Evenden spent the first 18 days of June in the field attending 
a conference at Ogden, Utah, with Dr. Craighead and J. M. Miller, and.in 
an inspection of bark-beetle control operations and station experimental 
projects. Dr. Craighead accompanied Mr. Evenden on a visit to the bark-— 
beetle control projects directed against the spruce budworm in the Cody 
Canyon, Shoshone National Forest. 
L. G. Baumhofer, who has been on temporary detail to the Coeur 
d'Alene field laboratory for the purpose of conducting a series of exam— 
inations of treated trees, in order to determine the actual results se— 
cured from the burning-standing method of control used against the moun— 
tain pine beetle in lodgepole pine, was relieved by T. T. Terrell early 
in June. Mr. Baumhofer returned to Halsey, Nebr., where his services in 
connection with the studies of the tip moth were required. 
D. DeLeon, who for the past three years has been engaged in the 
study of insects found in association with the mountain pine beetle in 
both lodgepole pine and white pine, resigned from the Bureau on May 14. 
Mr. DeLeon sailed on May 29 for Europe, where he plans to spend a year 
and a half in obtaining his doctorate degree by further study of insect 
parasitology. 
On June 8G. R. Struble started field work at the California Experi- 
ment Station base on the Stanislaus National Forest, Calif. He will be 
assisted by Albert Wagner. Studies will be centered for the season on the 
fir engraver beetle, with the object of developing methods of control. 
The University of California will cooperate on the project through the as— 
Signment of Dr. Aaron Gordon, who will carry on experiments to determine 
the possibility of preventing attacks of the fir engraver by tree-injec— 
tion methods. 
