MONTHLY LETTER OF THE BUREAU OF ENTOMOLOGY ela 
UNITED STATES DEPARTMENT OF AGRICULTURE 
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: October, 1920 
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FOREST INSECT INVESTIGATIONS 
A.D.Hopkins, Forest Entomologist in Charge | 
In October, 1920, a scale insect identified by H. Morrison of this 
Bureau as Leucaspis jaronica Ckll., was found injuring a privet hedge at 
Cleveland Park, Washington, D. C. Mr. Morrison states that this scale 
has apparently not been reported from the District of Columbia previously. 
Every effort was made to exterminate it, since it is likely to be a 
serious pest. 
This fall we have received much correspondence in regard to injury 
to the foliage of shade trees and hardy shrubs by mites, Dr. H,H.Ewing 
has identified many of these mites, quite a number of species being involved. 
On October 16 Dr. F. C. Craighead Left Washington to investigate 
barkbeetles killing seed trees left on cut-over pine lands in the vicinity 
of New Orleans, La. The lumber companies leave seed trees to reforest 
cut-over lands naturally, and if the seed trees are killed by insects there 
is no reproduction or new growth. 
On October 18 8. A. Rohwer left Washington for a trip to Philadelphia, 
New Haven, Boston, New York, and Harrisburg to make a study of types of 
Hymenoptera and to study the collections in museums at these localities. 

DECIDUOUS FRUIT INSECT INVESTIGATIONS 

A.L.Quaintance, Entomologist in Charge 
John J. Davis, who has been in charge of the Japanese beetle project 
at Riverton, N. J., has resigned to accept the position of head of the 
Department of Entomology of Purdue University and Experiment Station. Mr. 
Davis, however, has been appointed as collaborator of this office. 
C.H.Hadley, who has been Mr. Davis’s principal assistant at Riverton, 
N.J., has been placed in charge of the Japanese beetle project. 
Joseph lL. King, a graduate of Ohio State University and postgraduate 
of the University o? Illinois, has been appointed as specialist in insect 
parasites and is now en route to Yokohama, Japan, where he will assist 
C.P.Clausen in collecting and rearing parasites of the Japanese beetle for 
i into New Jorssy. 
a ise J. Culver, iene been in charge of the Bureau’s laboratory 
at Fort Valley, Ga., has been transferred to the Insecticide and Fungicide se 
Board, with headquarters at Vienna, Va., where he will assist in connection wit 
testing proprietary insecticides to determine the efficacy of claims made 
py manufacturers on the labels of their preparations. 
0.1.Snapp, who has been engaged in research work with capri epsbler ws at 
Agricultural Gollege, Miss., has been placed in general charge of the 
Bureau’s laboratory at Fort Valley, Ga., where a reinvestigation of the 
