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TAXONOMY 
Harold Morrison, in Charge 
Paul W. Oman spent the first three weeks in April at Ohio State 
University. Columbus, Ohio, where he worked on various groups of leaf-= 
hoppers and particularly on some western forms, with the assistance of 
Prof. Herbert Osborn and Dr. D. M. DeLong. 
“Professor Samuel Williams, of the department of zoology, University 
ie Pittsburgh, Pa., Spent April 1 and 2 in the National Museum, examining 
the collection of Cerambycidae, especially the species from British 
Guiana. 
E. 0. Pearson, a research student of the Empire Cotton-Growing 
Corporation, who is now spending some time at Harvard University, studied 
the National collections of bugs of the genus Dysdercus April 14 to 18, 
in connection with a revision of the neotropical species of the genus. 
A. M. Vance, of the Bureau's European corn-borer laboratory, 
Arlington, Mass., recently came to Washington to consult with R. A. 
Cushman, of the section of Hymenoptera, regarding the morphology of 
hymenopterous larvae. 
C. W. Johnson, Curator of the Boston Society of Natural History, 
Studied the collections of Diptera in the National Museum, April 15 to 
17. 
Dr. Dayton Stoner was in Washington April 22 to 29 and called at 
the Taxonomic Unit to consult its specialists. | 
On April 21 Raymond S. Williams, Curator of Insects in the Williams 
Natural History Society, Covington, Ky., visited the National Museum to 
sxamine methods of installation of insect collections. He also discussed 
the beetles of his locality with the specialists in the section of 
Coleoptera. 
A. B. Gahan, of the section of Hymenoptera, recently completed an 
exchanges with the Naturhistorisches Museum of Vienna, through which he 
added to the collections about 200 determined species of Chalcidoidea, 
mostly European. 
Professor Herbert Osborn, of the department of zoology and ento=| 
mology, Ohio State University, examined the National collections of 
leafhoppers April 24 to 25. 
On April 25 Dr. W. J. Phillips, of the Bureau's cereal and forage 
insect laboratory at Charlottesville, Va., came to Washington to consult 
with A. B. Gahan regarding certain joint-worm flies of the genus Harmolita. 
