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Indiana University Studies 
Felt at the New York State Museum, and T. H. Frison at the Illinois 
State Laboratory of Natural History. 
Mr. L. H. Weld, of East Falls Church, Virginia, who has contributed 
some data from his own and the National Museum collections. 
The following who have made outstanding contributions of insects 
and galls: the late F. A. Leach of Piedmont, California; Dr. J. T. Patter- 
son of the University of Texas; Dr. Ralph Voris of the Southwestern 
Missouri Teachers College; Miss Pauline Schulthess and Miss Dorothy 
Hildebrand of Kelseyville, California; Mrs. W. E. Smith of Picayune, 
Mississippi; Miss O. Buchanan of Eddyville, Illinois; B. and H. J. Pack 
of Salt Lake City, Utah; Dr. Charles Sajo of Oerszentmiklos, Hungary; 
Dr. Ed. Baudys of Brno, Czecho-Slovakia; W. E. Noury of Bois Guil- 
bert par Buchy, France; E. B. Hoffmeyer of Havdrup, Denmark; and 
possibly a hundred other collectors, many of them collectors of important 
material, each item of which is duly credited with the distribution and 
other data in the systematic portion of this paper. 
Several who have borne the burden of the technical work involved 
in the preparation of the insects, drawings, and manuscript for this 
study: W. H. Vance, Mrs. I. T. Wilson, Miss F. D. Flemion, Miss E. 
Arnold, Miss L. F. Ritterskamp, Miss Z. E. Gross, Mrs. R. Voris, Mrs. 
H. P. Wright, C. J. Quick, and Miss E. E. Wilkinson; especially Miss 
L. F. Ritterskamp who has been directly in charge of the technical work 
during the past three years. 
The Zoology Faculty at the Ohio State University, who allowed 
me the use of their library facilities. 
The John Crerar Library, at Chicago, which has given me free 
access to their superb collection of scientific volumes. 
The Indianapolis Engraving Company, who are responsible for the 
photographs of galls reproduced herewith. 
