SDA REO FVLLUL EN OFS 
DwicuT H. GREEN, Governor 
DEPARTMENT OF REGISTRATION AND EDUCATION 
FRANK G. THompson, Director 
BOARD OF NATURAL RESOURCES AND CONSERVATION 
FRANK G. THOMPSON, Chairman 
WILLIAM TRELEASE, D.Sc., LL.D., Biology* 
Ezra J. Kraus, Ph.D., D.Sc., Forestry 
L. R. Howson, B.S.C.E., C.E., Engineering 
ARTHUR CutTTs WILLARD, D.Eng., LL.D., 
President of the University of Illinois 
NorMAN L. Bowen, Ph.D., Geology 
RoGeR ADAMS, Ph.D., D.Sc., Chemistry 
NATURAL HISTORY SURVEY DIVISION 
Urbana, Illinois 
SCIENTIFIC AND TECHNICAL STAFF 
THEODORE H. Frison, Ph.D., Chief 
FLORENCE A. NyBeroG, Assistant to the Chief 
Section of Economic Entomology 
G. C. Decker, Ph.D., Entomolgist 
M. D. Farrar, Ph.D., Research Entomolo- 
gist 
J. H. Biccer, M.S., Associate Entomologist 
S. C. CHANDLER, B.S., Southern Field Ento- 
mologist 
JAMES W. APPLE, M.S., 
Entomologist (on leave) 
B. G. Bercer, M.A., Assistant Entomologist 
JoHN M. Waicut, B.A., Assistant Ento- 
mologist (on leave) 
H. B. Petry, Jr., M.A., Associate in Ento- 
mology Extension 
C. J. WEINMAN, Ph.D., Special Research 
Assistant 
Witiis N. Bruce, B.S., Special Research 
Assistant 
Northern Field 
Section of Insect Survey 
H. H. Ross, Ph.D., Systematic Entomologist 
Cart O. Monr, Ph.D., Associate Entomolo- 
gist, Artist (on leave) 
B. D. Burks, Ph.D., Assistant Entomolo- 
gist (on leave) 
MILTON W. SANDERSON, 
Entomologist 
PHYLLIS A. BEAVER, Laboratory Assistant 
Ph.D., Assistant 
Section of Forestry 
JaAMeEs E. Davis, M.F., Extension Forester 
Section of Aquatic Biology 
Grorce W. BENNETT, Ph.D., Limnologist 
D. F. Hansen, Ph.D., Assistant Zoologist 
Pau. G. BarRNIcKOL, M.A., Ichthyologist 
Section of Game Research and Management 
R. E. YEATTER, Ph.D., Game Specialist 
Section of Wildlife Experimental Areas 
ARTHUR S. Hawkins, M.S., Game Tech- 
nician (on leave) 
F. C. BELLROSE, JR., B.S., Associate Game 
Technician 
Harotp C. Hanson, M.S., Assistant Game 
Technician 
Section of Applied Botany and Plant 
Pathology 
L. R. TEHON, Ph.D., Botanist 
J. C. Carter, Ph.D., Assistant Botanist 
G. H. Borewe, M.S., Field Botanist 
J. L. Forsperc, M.S., Research Pathologist 
Bessie B. HENDERSON, M.S., Research Assist- 
ant 
Section of Publications 
James S. Ayars, B.S., Technical Editor 
ELEANOR G. WOLFF, B.Ed., Assistant Tech- 
nical Editor 
Technical Library 
MARGUERITE SiMMons, M.A., M.S., Techni- 
cal Librarian 
CONSULTANTS IN HERPETOLOGY: Howarp K. Gtoyp, Ph.D., Director of the Museum, Chicago 
Academy of Sciences; CiirForD H. Pope, B.S., Curator of Amphibians and Reptiles, Chicago 
Natural History Museum 
*Deceased January 1, 1945. 
This paper is a contribution from the Section of Publications. 
(81447—800—4-45) 
