TAXONOMIC INVESTIGATIONS 
S. A. Rohwer, Senior Entomologist, in Charge 
A. B. Gahan returned to Washington on January 16 after four months 
spent in Europe studying in the various museums. The purpose of the 
visit was to study types of Chalcidoidea in a number of the old collec— 
tions of Europe, notably the Férster, Gustav Mayr, Ratzeburg, Walker, 
and Westwood collections.’ The greater part of Mr. Gahan's time was spent 
in the British Museum of Natural History, but he also visited the Hope 
Museum at Oxford, the Musée National d'Histoire Naturelle at Paris, the 
Naturhistorisches Museum at Vienna, the Forstliche Hochschule at Ebers-— 
walde, the Deutsches Entomologisches Institut at Dahlem, and the Zoolog— 
isches Museum der Universitat at Berlin. Many interesting notes and a 
large number of specimens which have been compared with types were secured, 
Dr. H. W. Allen and H. A. Jaynes, of the Japanese Eeetle In- 
vestigations Laboratory at Moorestown, N. J., visited the Taxonomic Divi~— 
sion on January 30 and 31 for the purpose of conferring with Mr. Gahan 
regarding the identity of a number of parasitic wasps which are being in— 
troduced from the Orient to combat the Japanese beetle. While he was in 
Europe, Mr. Gahan compared specimens with types of Oriental Tiphia in the 
British Museum and made notes for the use of Dr. Allen and Mr. Jaynes. 
Dr. J. M. Aldrich, who has been ill with appendicitis for several 
weeks, returned to his office on the afternoon of January 31. 
Dr. E. D. Ball, former Director of Scientific Work of thewDew 
partment, and now located in Sanford, Fla., spent several days in the 
Division of Insects studying Homoptera. 
Dr. J. W. Folsom, of the Cotton Insects Field Laboratory at Tal- 
lulah, La., was a visitor in the Division on January 27, and left for 
identification many lots of insects collected by airplane. i 
S. E. Crumb, of Clarksville, Tenn., spent the last week of Jan-— 
uary working on noctuid larvae in the Museum collections. 
R. J. Sim, of the Japanese Beetle Laboratory, Moorestown, N. J., 
spent about a week in the latter part of the month making drawings of 
the genitalia of species of Phyllophaga in the Coleoptera collections of 
the Museun. 
F. E. Wilson, graduate student at Harvard University, visited 
the Division in the early part of the month to discuss taxonomic work 
on the genus Scymnus. Mr. Wilson is planning work on a taxonomic revi— 
sion of Scymnus of North America. 
H. ©. Hallock, of Westbury, Long Island, N. Y., spent January 9 
to 14 in the Division, working on the species of the genus Cryptomeigenia 
det 
