
ees 
Miss Grace Sandhouse, of the taxonomic unit, spent the last week 
of April in Philadelphia studying bees in the collection of the Academy 
of Natural Sciences, particularly the Cresson types of Osmia and related 
genera. 
On April 235 Dr. Herbert Osborn, of Ohio State University, called 
at the Museum to examine types of Homoptera in the National Collection. 
On April 25 Dr. E. D. Ball, Dean of the College of Agriculture, 
University of Arizona, at Tucson, and Director of the Agricultural Exper-— 
iment Station, worked on some of the Homoptera in the collections. 
Dr. Joseph Bequaert, of the School of Tropical Medicine, Harvard 
University, visited the Museum April 26 to compare specimens of blood- 
sucking flies and of certain diplopterous wasps. 
INSECTS AFFECTING MAN AND ANIMALS 
F. C. Bishopp, in Charge 
F. C. Bishopp left Washington April 3 for Los Angeles, Calif., 
where he appeared as a witness in court in a case involving alleged 
infringement of the Insecticide Act by the manufacturer of a proprie— 
tary insecticide. Later he conferred with Prof. W. B. Herms and cthers, 
at the University of California, and then went to the Coachella Valley, 
in California, where a new field laboratory is being established for the 
study of the eye gnat, a species of Hippelates, which is a serious pest 
of man in that locality. On his return trip he visited the field lab-— 
oratories at Tucson, Ariz., and El Paso, Uvalde, Sonora, Menard, and 
Dallas, Tex., and reached Washington April 28. 
D. C. Parman, of the field laboratory at Uvalde, Tex., went to 
Los Angeles April 10, for conference with Mr. Bishopp. He is now in the 
Coachella Valley, conducting preliminary investigations on the biology 
and control of the eye gnat. 
W. G. Bruce, of the field laboratory at Fargo, N. D., -did-con— 
siderable traveling during April in North Dakota and Minnesota, in the 
course of his investigations concerning cattle grubs. While in St. Paul, 
Minn., he conferred with members of the State experiment station and ex-— 
tension staffs on certain phases of the problem. 
W. V. King writes from Manila, where he is investigating the 
malaria mosquitoes of the Philippine Islands, under the auspices of the 
International Health Board, that he expects to return to his duties at 
Mound, La.. about June 15. 
