6 LEAFHOPPEES AEEECTING CEKEALS, ETC. 
Prof. H. Garman, Lexington, Ky.; Mr. Harper Dean, San Antonio, 
Tex.; Prof. S. M. Tracy, Biloxi, Miss.; Mr. D. L. Van Dine, New 
Orleans, La.; Prof. A. E. Vinson and Dr. D. T. McDougall, of Tuc- 
son, Ariz.; Profs. C. W. Woodworth and W. B. Herms and Mr. Clias. 
Fuchs, at Berkeley, Cal.; Profs. E. D. Ball and E. G. Titus, at Logan, 
Utah; Prof. C. P. Gillette, Fort Collins, Colo.; Profs. T. J. Headlee and 
G. A. Dean, at Manhattan, Kans. ; and Prof. S. J. Hunter, Lawrence, 
Kans. The collections at Cornell University, the Carnegie Museum, 
the Illinois State Laboratory of Natural History , Iowa State College 
(Ames, Iowa) , the American Museum of Natural History (New York) , 
the Boston Society of Natural History at Boston, the New Hampshire 
Agricultural College, the Bureau of Entomology, and the National 
Museum, as well as the private collections of many individuals, 
especially those of Mr. E. P. Van Duzee and Dr. E. D. Ball, have 
been freely at my disposal and have yielded many records of value. 
A large number of the drawings have been made by the skillful 
hand of Miss Charlotte King, of Ames, Iowa; and some others, also 
of her drawing at an earlier period, have been used from the Iowa 
Experiment Station bulletins with the kind consent of the station 
officers. 
H. O. 
