aT eee 
INSECTS AFFECTING MAN AND ANIMALS 
F. C. Bishopp, Senior Entomologist, in Charge 
On April 16 F. C. Bishopp and 0. G. Babcock appeared as witnesses 
in a case at Topeka, Kans., which was successfully prosecuted by the Food, 
Drug and Insecticide Administration against a manufacturer of a lime— 
sulphur mixture advocated for internal administration against external 
parasites of poultry. 
In the latter half of April F. ©. Bishopp visited various points 
in Kansas, Iowa, Minnesota, North Dakota, South Dakota, and Nebraska, 
particularly in connection with a study of the present status of the 
cattle grubs in the Red River Valley of the North, and adjacent regions. 
After concluding this work he visited the laboratories at Dallas, Tex., 
and Tallulah, La. 
In the last week of April G. H. Bradley and T. E. McNeel, of the 
Mound, La., Laboratory, made a brief survey of the region around Charles— 
ton, Miss., where a severe outbreak of buffalo gnats occurred. About 100 
head of horses and mules were found to have been killed by the gnats in 
this vicinity. 
At the urgent request of farmers and ranchmen in the Coachella 
Valley, Calif., D. C. Parman spent the greater part of April studying 
the gnats (Hippelates) in this valley and in the Imperial Valley. These 
gnats have assumed major importance hecause of the annoyance they cause 
man, and almost certainly serve as important carriers of various eye 
diseases, including trachoma. Since Dr. Herms and Prof. Woodworth have — 
been studying the breeding habits and other phases of the problem, Mr. 
Parman devoted his attention entirely to preliminary observations on the 
chemotropic responses of the insects and the development of a trap for 
the purpose of catching them. A trap was devised which caught millions 
of the gnats and attracted much attention. In connection with this trio 
Mr. Parman studied the screw-worm situation in various points in the 
western part of Texas and in New Mexico and Arizona. 
On April 20 J. L. Webb visited the Marine Barracks at Quantico, 
Va., to make a preliminary survey on the situation there regarding house 
flies. Some cooperative control work against them is planned, to be 
carried out during the present season. 

FOREST INSECT INVESTIGATIONS 
F. C. Craighead, Senior Entomologist, in Charge 
Dr. F. C. Craighead spent the last week in April at Asheville, 
Neewe, With R.A. St. Georre andsd Ave pea i reviewing plans for the 
summer's work in the region about Asheville. The chief activities there 
for the coming summer will be a continuation of studies on the southern 
pine beetle and the locust borer. 
