STATE OF ILLINOIS 

 DwiGHT H. Green, Go^<ernor 



DEPARTMENT OF REGISTRATION AND EDUCATION 

 Frank G. Thompson, Director 



BOARD OF NATURAL RESOURCES AND CONSERVATION 

 Frank G. Thompson, Chairman 



Carl G. Hartman, Ph.D., Biology Arthur Cutts Willard, D.Eng., LL.D., 



Ezra J. Kraus, Ph.D., D.Sc, Forestry President of the University of Illinois 



L. R. HowsoN, B.S.C.E., C.E., Engineering Norman L. Bowen, Ph.D., Geology 



Roger Adams, Ph.D., D.Sc, Chemistry 



NATURAL HISTORY SURVEY DIVISION 



Urbana, Illinois 



Scientific and Technical Staff 



Leo R. Tehon, Ph.D., Acting Chief 

 Bessie B. Henderson, M.S., Assistant to the Chief 



Section of Economic Entomology 



G. C. Decker, Ph.D., Entomologist 



M. D. Farrar, Ph.D., Research Entomologist 



J. H. Bigger, M.S., Associate Entomologist 



S. C. Chandler, B.S., Southern Field Ento- 

 mologist 



James W. Apple, M.S., Northern Field Ento- 

 mologist 



C. J. Weinman, Ph.D., Associate Entomolo- 

 gist 



John M. Wright, B.A., Assistant Entomol- 

 ogist 



H. B. Petty, Jr., M.A., Associate in Ento- 

 mology Extension 



Willis N. Bruce, B.S., Special Research 

 Assistant 



George F. Ludvik, B.A., Special Research 



Assistant 



Section of Insect Survey 



H. H. Ross, Ph.D., Systematic Entomologist 

 Carl O. Mohr, Ph.D., Associate Entomolo- 

 gist, Artist 

 B. D. Burks, Ph.D., Assistant Entomologist 

 Milton W. Sanderson, Ph.D., Assistant 



Entomologist 

 Elizabeth N. Maxwell, B.A., Artist, Ento- 

 mological Assistant 

 Phyllis A. Beaver, Laboratory Assistant 



Section of Forestry 



Willet N. Wandell, M.F., Forester 



James E. Davis, M.F., Extension Forester 



(on leave) 

 Arthur C. Hart, M.F., Extension Forester 



Technical Library 



Marguerite Simmons, M.A., M.S., Techni- 

 cal Librarian 



Section of Aquatic Biology 



George W. Bennett, Ph.D., Limnologist 

 D. F. Hansen, Ph.D., Assistant Zoologist 

 Paul G. Barnickol, M.A., Ichthyologist 

 Elizabeth B. Chase, Ph.D., Research Assist- 

 ant 

 Lynn H. Hutchens, B.A., Laboratory 

 Technician 



Section of Game Research and Management 



R. E. Yeatter, Ph.D., Game Specialist 



Section of Migratory Waterfowl 



F. C. Bellrose, Jr., B.S., Associate Game 



Technician 

 Harold C. Hanson, M.S., Assistant Game 



Technician 



Cooperative Wildlife Research (With State 

 Department of Conservation and U. S. 

 Fish and Wildlife Service) 



C. C. Swears, M.F., Project Leader 

 L. E. Foote, M.S., Project Leader 



F. X. Lueth, M.S., Project Leader 



A. B. Cowan, B.S.F., Assistant Project Leader 



Section of Applied Botany and Plant Pathology 

 L. R. Tehon, Ph.D., Botanist 

 J. C. Carter, Ph.D., Associate Botanist 



G. H. Boewe, M.S., Field Botanist 



J. L. Forsberg, M.S., Research Pathologist 



Section of Publications 



James S. Ayars, B.S., Technical Editor 

 ] LoREENA Moudy, B.S., Assistant Techni- 

 cal Editor 

 Robert E. Hesselschwerdt, B.A., Assistant 

 Technical Photographer 



Consultants in Herpetology: Howard K. Gloyd, Ph.D., Director of the Museum, Chicago 

 Academy of Sciences; Clifford H. Pope, B.S., Curator of Amphibians and Reptiles, Chicago 

 Natural History Museum. 



This paper is a contribution from the Section of Publications. 



(13834— SOO— 3-46) 



