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TAXONOMIC INVESTIGATIONS 
Harold Morrison, in Charge 
P. H. Timberlake, of the Citrus Experiment Station, Riverside, 
Calif., spent August 1 to 11 in the National Museum, consulting with the 
Bureau specialists in Hymenoptera and studying the collection of bees 
and parasitic Hymenoptera. While here, Mr. Timberlake deposited in the 
Museum collection types of many of his species of bees of the genus 
Perdita. 
R. L. Taylor, of the Bussey Institution, was in the National 
Museum August 6 to 8, discussing certain phases of a project on the in- 
sects reared from the burrows of the white-pine weevil, Pissodes strobi. 
The insects obtained by Mr. Taylor were determined by the Bureau special— 
ists: 
Dr. C. E. Mickel spent August 10 to 11 and August 20 to 22 in 
Philadelphia, studying type specimens of Mutillidae. 
Prof. T. B. Mitchell, of the Department of Zoology and Ento— 
mology, North Carolina State College, called at the Museum August 18 to 
study certain bees in connection with his work on the genus Megachile. 
R. C. Shannon, of the Rockefeller Foundation, returned to Wash- 
ington August 20, after spending six months in Peru. Mr. Shannon will be 
in the Museum about six weeks, working up some insects collected in con- 
nection with his investigations of verruga fever--a disease known only in 
Peru: 
The members of the Taxonomic Investigations who attended the Fourth 
International Entomological Congress at Ithaca, N. Y., August 12 to 18, 
were Dr. H. Morrison, Dr. A. G. Béving, Dr. C. E. Mickel, August Busck, 
A. B. Gahan, Carl Heinrich, Miss Grace Glance, and Miss Louise Russell. 
At the Congress, in a forum on problems of taxonomy, Dr. Morrison led 
discussions on determinations. Dr. Béving presented a paper on the clas— 
sification of beetles according to larval characters. 
Dr. C. F. Adams, of the State Board of Health, Indianapolis, Ind., 
recently spent considerable time in the Division of Insects examining 
recent literature on Diptera. 
Of the entomologists who visited Washington after the Interna- 
tional Entomological Congress, a number, here named, spent considerable 
time in the Museum consulting with the Bureau specialists and examining 
collections. From Belgium was Antoine Ball, of the Royal Natural History 
Museum, Brussels. From Denmark, Prof. K. L. Henriksen, of the University 
Zoological Museum, Copenhagen, M. Thomsen, of the Royal Veterinary and 
Agricultural High School, Copenhagen, and J. P. Kryger, of the Department 
of Entomology. From England, Dr. James Waterston, F. W. Edwards, N. D. 
