STATE OF TLUIENOES 
Dwicut H. Green, Governor 
DEPARTMENT OF REGISTRATION AND EDUCATION 
Frank G. Tuompson, Director 
BOARD OF NATURAL RESOURCES AND CONSERVATION 
Frank G. Tuompson, Chairman 
Wi.uiaM TRELEASE, D.Sc., LL.D., Biology 
Ezra J. Kraus, Ph.D., D.Sc., Forestry 
L. R. Howson, B.S.C.E., C.E., Engineering. 
Artuur Cutts WILLARD, D.Eng., LL.D., 
President of the University of Illinots 
Epson S. Bastin, Ph.D., Geology 
RoceEr Apams, Ph.D., D.Sc., Chemistry 
NATURAL HISTORY SURVEY DIVISION 
Urbana, Illinois 
SCIENTIFIC AND TECHNICAL STAFF 
Tueopore H. Frison, Ph.D., Chief 
Section of Economic Entomology 
W. P. Fuint, B.S., Chief Entomologist 
C. C. Compton, Ph.D., Associate Ento- 
mologist 
M. D. Farrar, Ph.D., Research Ento- 
mologist 
J. H. Biccer, M.S., Associate Entomolo- 
gist 
S. C. Cuanpcer, B.S., Southern Field 
Entomologist 
James W. Appts, M.S., Northern Field 
Entomologist 
B. G. Bercer, M.A., Assistant Ento- 
mologist 
H. B. Perry, Jr., B.A., Assistant, Ento- 
mology Extension 
J. E. Porter, B.A., Entomological Asstst- 
ant 
C. J. Wernman, Ph.D., Research Fellow 
in Entomology 
Georce F. Lupvix, B.A., Research Fellow 
in Entomology 
J. M. Macner, B.A., Funior Entomolo- 
gist (U.S.B.E.P.Q. and Commodity 
Credit Corporation, cooperating) 
Section of Insect Survey 
H. H. Ross, Ph.D., Systematic Entomolo- 
gist 
Cart O. Monr, Ph.D., Associate Ento- 
mologist, Artist 
B. D. Burks, Ph.D., Assistant Entomolo- 
gist (On leave) 
G. T. Rrecet, M.S., Entomological Assist- 
ant 
Katuryn M. SommMerMAN, M.S., Artist, 
Entomological Assistant 
Section of Forestry 
James E. Davis, M.F., Extension Forester 
Lee E. Yeacer, Ph.D., Forester 
Section of Aquatic Biology 
Davip H. Tuompson, Ph.D., Zoologist 
Georce W. Bennett, Ph.D., Limnolo- 
gist 
D. F. Hansen, Ph.D., Assistant Zoologist 
Bruno Limsacu, M.S., Zoological Assist- 
ant 
Section of Game Research and Manage- 
ment 
R. E. Yeatrer, Ph.D., Game Specialist 
Section of Wildlife Experimental Areas 
Artuur S. Hawkins, M.S., Game Tech- 
nician (On leave) 
F. C. Bexirose, Jr., B.s., Assistant 
Game Technician 
J. B. Low, Ph.D., Assistant Game Tech- 
nician 
W. H. Exper, Ph.D., Assistant Game 
Technician 
Cooperative Wildlife Restoration Pro- 
gram 
(State Department of Conservation and 
U. S. Fish and Wildlife Service) 
Harry G. Anverson, M.A., Funior Bi- 
ologist 
L. G. Brown, B.S., funior Biologist 
R. E. HesseirscHwerpt, B.A., Funior 
Biologist 
C. S. Spooner, Jr., M.F., Funior Biolo- 
gist 
Section of Applied Botany and Plant 
Pathology 
L. R. Tenon, Ph.D., Botantst 
D. B. CreaceEr, Ph.D., Research Patholo- 
gist 
J. C. Carrer, Ph.D., Assistant Botanist 
G. H. Boreweg, M.S., Field Botanist 
Section of Publications 
James S. Ayvars, B.S., Technical Editor 
Consuttant: Herpetology, Howarp K. Gioyp, Ph.D., Director of the Museum, 
Chicago Academy of Sciences 
This paper is a contribution from the Section of Insect Survey. 
(22821—1200—4-42) 
SES FATT. 
D2 
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