6 
FOREST INSECT INVESTIGATIONS. 
A. D. Hopxtins, In Charge. 
Mr. A. B. Champlain has been transferred from the field station at Colorado Springs, Colo., 
to the station at Hast Falls Church, Va., where he will continue his studies of beneficial forest 
Coleoptera. 
Mr. Carl Heinrich has just returned from a two weeks tour in New York and Pennsyiganin 
of investigations of the European pine-shoot moth (Hvetria buoliana) and an outbreak of 
cankerworms. : 
Dr. A. D. Hopkins has spent about 10 days at Kanawha Station, W. Va., in connection 
with experimental work on insects affecting rustic work, a continuation of life-history studies 
on trap trees and general field work on forest insects. 
Mr. F. C. Craighead spent about two days at Chillicothe, Ohio, examining a large poplar 
plantation for insect damage and arranging for experiments in the control of the borer and other 
insects affecting the poplar. Also three days at Kanawha Station, W. Va., where he was suc- 
cessful in collecting a large series of all stages of the very rare cerambycid beetle (Leptura 
emarginatus) and making some interesting new observations on hickory, ash, and oak insects. 
Mr. Craighead has just returned from a trip to Boston to study the results of experiments in 
the control of Agrilus bilineatus, which is responsible for the death of oak trees defoliated by 
the gipsy moth, and he reports that the experiments Of disposing of the infestation in the prin- 
cipally infested trees has had a marked effect im reducing the number of dead trees. He also 
spent a day on Long Island inspecting the control work conducted on an estate against Scolytus 
quadrispinosus on. hickory trees and Agrilus bilineatus on oak trees defoliated by cankerworms 
and tent caterpillars. He found that the control work had been done mates to recom- — 
mendations and with apparent success. 
Mr. T. E. Snyder returned June 23 from a 10 days trip through the sane Appalachian 
Mountains in Virginia, Tennessee, and North Carolina to study the present status of infestation 
by the southern pine beetle (iahdroesrine frontalts) and to collect material; also to study the 
blight on white-pine twigs and the galls on spruce caused by a species of Chermes. In the 
course of his trip the White Top Purchase Area in Virginia and Tennessee was visited, where 
the Forest Service, upon recommendations of this branch, cut and burned the bark in March, 
1915, on approximately 1,600 infested pine trees. Mr. Snyder found only three trees contain- 
ing broods of D. frontalis, and these trees were not in the immediate vicinity of treated areas, 
which indicates the success of the control work. In the study of the Chermes blight the stands 
of spruce on White Top Mountain in Virginia, elevation 5,520 feet, and on Mount Mitchell in 
North Carolina, elevation 6,711 feet, were examined, as well as the white pine in the valleys, 
but no evidence of the pine twig blight or new Chermes galls were found in the localities where 
both were so common last year. 
Mr. S. A. Rohwer has just returned from a tour into Canada and the New England States 
to study the types of parasitic Hymenoptera. A week was spent in Ottawa workine over the 
types of Harrington and Provancher in the personal collection of W. H. Harrington and in 
the collection of the Division of Entomology of the Department of Agriculture, Canada. About 
three weeks were spent in studying the bulk of the Provancher collection, which is in the Museum 
of Public Instruction in the Parliamentary Building, Quebec. This collection contains most of 
the types of Provancher and is in fair condition, arranged exactly as left by Provancher. | 
Another week was spent in Boston studying in the Museum of Cambridge University and in 
New Haven studying the Norton types in the collection of the Peabody Museum of Yale 
University. 
Mr. W. S. Fisher has just returned from Harrisburg, Pa., where he is carrying on investi- 
gations of the hickory bark beetle. 
