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i iete me large measure is the two-lined chestnut borer (Agrilus 
neatus). They attack the top killing this in one or two seasons and fre- 
quently kill the entire tree. apres “16s 
At Colorado Springs, Mr. Craighead was studying the work carried on at that 
station for the past two years in the control of poplar borers (Saperda 
Calcarata and Xylotrechus oblitveratus). At higher elevations entire stands 
of poplars have been destroyed by these insects. 
STORED PRODUCT INSECT INVESTIGATIONS. 
E. A, Back, Entomologist in Charge. 
F. B. Milliken, of the Wichita station, recently spent two weeks in Washing- 
ton preparing manuscripts relating to his past work on grasshoppers, chinch bug, 
@ad blister beetles. In the future Mr, Milliken will devote his time to a study 
of insects affecting mills, grain elevators, etc. 
Messrs. Millikin and Duckett of this office made a recent visit to The Crown 
Cork and Seal Co., Baltimore, Maryland, to obtain samples of insect-infested cork 
and caseine, The latter is a byproduct of milk and is one of the constituents of 
glue used by this company. Dermestes vulpinus Fab., Cathartus advena 
Waltl., and Laemophloeus minutus Oliv., were collected on cork in about equal 
numbers, Dermestes vulpinus Fab., Trogoderma tarsale Melsh., Lepisma 
saccharina L,, and a small undetermined moth were collected in the top of bins 
containing caseine, 
This branch desires to obtain living specimens and samples of injury of all stor- 
ed product insects for future study in the laboratory, All members of this Bureau 
are earnestly requested to send infested stored product material to this branch 
whenever such can be obtained. A. B. Duckett. 

TROPICAL AND SUBTROPICAL FRUIT INSECT INVESTIGATONS 
C. L. Marlatt, Entomologist in Charge. 
W. W. Yothers has returned to Florida to take up active field work and to 
cooperate in the Emergency Extension Service in Relation to the control of insects 
affecting citrus and subtropical fruits, He has submitted for publication the 
_ following manuscripts: "Some Reasons for Spraying Citrus Trees in Florida"; and 
"Spraying for Citrus Pests in Florida." 
Harry D. Young has been employed and will be associated with R. 8. Woglum, in 
connection with the Hmergency Service of this Bureau. His work will have partic- 
ulur relation to all technical matters concerning fumigation. Mr. Young graduated 
from the Department of Chemistry of the University of Nebraska in 1908, He had two 
years’ experience in the Arkansas Experiment station, and during the past seven 
years he has been engaged in agriculturel chemistris in the state pathological lab- 
oratory at Whittier and since 1913 has been acting superintendent of that labor- 
atory. He is the author of several papers published in technical and other 
journals having relation to citrus culture and hydrocyanic gas fumigation, 
A. D. Borden has been assigned to an investigation of the citrophilous mealey- 
bug at Upland, Calif., in response to demands following a very serious outbreak of 
this pest in that section, 
R. S. Woglum reports that on the 17th of this month a man was killed at Upland, 
California, by liquid hydrocyanic acid while making preparations to fumigate citrus 
trees either due to some defect in the apparatus or possibly to carelessness. This 
