La 2 pe 
FOREST INSECTS 
F. C. Craighead, in Charge 
J. C. Evenden reports that experimental fall control against 
the mountain pine beetle in Montana has demonstrated that peeling the 
bark is not practicable at this time of the year, and that decking the 
logs and burning them had to be resorted to. 
F. P. Keen has completed the eighth annual survey of bark—bee— 
tle losses in commercial stands of the yellow pine timber in south- 
eastern Oregon and northeastern California, and reports that there is 
a general decline in the losses this year. He believes that it is un-— 
guestionably correlated with the normal rainfall and conditions promoting 
food growth of the previous season. 
H. L. Person has completed the present season's field studies on 
the susceptibility of certain types of western yellow pine to the attack 
of Dendroctonus brevicomis, and a series of experiments in attraction 
which were correlated with those studies. 
The Bureau is recommending to the Forest Service and National 
Park Service the continuation of several control projects which have 
been under way for a year or two, and the initiation of several new projects. 
L. G. Baumhofer has completed his field work on the pine tip 
moth at Halsey, Nebr. He reports that the eastern parasite of this 
moth, a species of Campoplex, has continued to increase markedly this 
year, and that improved conditions in the growth of the trees are al- 
ready apparent. 
Dr. P. J. Chapman, entomologist of the Virginia Truck Experiment 
otativu, visited William Middleton, of this division, on October 23, 
to confer regarding the identification of the sweetpotato sawfly and 
to discuss the characterization of the larvae of the species. 
R. A. St. George found several outbreaks of the southern pine 
beetle in and near western North Carolina during the latter part of 
September. One outbreak was located at Hot Springs, N. C., in the French 
Broad Division of the Pisgah National Forest. Some 30 acres of pitch pine 
was found infested. The work on the southern pine beetle at the Ashe— 
ville field laboratory was brought to a close on October 6, when H. K. 
Rippey, temporarily employed since June, left for his home in Indiana 
and Mr. St. George returned to duty at Falls Church, Va. R. W. Caird, 
who was recently injured while engaged in work on the southern pine beetle 
and was confined to the hospital at Asheville, has sufficiently recovered 
to leave Asheville for his home in Chicago. 

