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FOREST INSECTS 
F. C. Craighead, in Charge 
Dr. T. BE. Snyder, of this office, attended the 27th annual. meeting 
of the American Wood-Pr.e.ervers' Association, held in Philadelphia Jan- 
uary 27 to January 29. At this meeting there was a general discussion 
of protection of wood from attack by termites. The work of the Bureau 
of Entomology on prevention of injury to buildings by termites was com-— 
mended. 
J. C, Evenden, in charge of the field laboratory at Coeur d'Alene, 
Idaho, attended the annual meeting of the Investigative Forest Research 
Council of Region 1, held in Spokane on January 9 and 10. This meeting 
was well attended, those present including representatives of the Uni- 
versities of Idaho and Montana, the Canadian Government, and all Govern-— 
ment Bureaus engaged in forest research, besides private foresters. 
A. L. Gibson has completed his report of the annual forest—in- 
sect survey of the Beaverhead National Forest. This survey is conducted 
to obtain data relative to the spread of epidemics of the mountain pine 
beetle. The report shows that the infestation has spread throughout the 
Beaverhead National Forest, and that some 3,859,000 trees were attacked 
in 1930, bringing the total destruction for the last four years up to 
7,000,000 trees. In the infestation of 1930 there was an increase of 
1,353,000 trees over the previous year's loss. The Beaverhead infesta-— 
tion spread from the Bitterroot and Salmon National Forests. 
Dr. K. A, Salman has been planning his work for the coming season, 
which will include a continuation of the Modoc surveys, carried on by H. 
L, Person until his transfer to the California Forest Experiment Station 
in December. Doctor Salman has summarized the work to date, and pre-— 
sented a progress report on the Devil's Garden extermination project in 
that region. 
Studies on the development of broods of the western pine beetle 
under different conditions of temperature and moisture, which have been 
conducted for the past two seasons under field conditions, are now being 
continued in the field laboratory at Berkeley during the winter months. 
J. A. Beal, of the field laboratory at Portland, shipped a quantity of 
green logs and infested bark to Berkeley, where he is temporarily located, 
in order to have the advantage of equipment loaned for his use in this 
study. The department of plant physiology of the University of California 
and the Bureau of Entomology have each supplied a number of different 
constant-—temperature chambers which are in operation. 
L. G. Baumhofer has been working over parasite material and data 
with reference to the control of the pine tip moth, Rhyacionia frustrana 
bushnelli, in the Nebraska National Forest by Campoplex frustranae Cush— 
man, a parasite introduced from Virginia in 1925. 
