STATE OF ILLINOIS 
WrtiraM G. Srratron, Governor 
DEPARTMENT OF REGISTRATION AND EDUCATION 
VerRA M. Binks, Director 
BOARD OF NATURAL RESOURCES AND CONSERVATION 
VerRA M. Binks, Chairman 
A. E. Emerson, Ph.D., Biology WALTER H. Newuouse, Ph.D., Geology 
L. H. Tirrany, Ph.D., Forestry RoGer ApaAms, Ph.D., D.Sc., Chemistry 
Ropert H. ANDERSON, B.S.C.E., Engineering 
Lioyp Morey, B.A., B.Mus., C.P.A., LL.D., D.Sc., President of the University of Illinois 
Detyte W. Morris, Ph.D., President of Southern Illinois University 
NATURAL HISTORY SURVEY DIVISION 
Urbana, Illinois 
SCIENTIFIC AND TECHNICAL STAFF 
HARLOW B. MILLS, Ph.D., Chief 
Bessie B. East, M.S., Assistant to the Chief 
Section of Economic Entomology Section of Applied Botany and Plant 
veces C. Decker, Ph.D., Entomologist and 
Heac 
J. H. Biccer, M.S., Entomologist 
L. L. ENGuiisH, Ph.D., Entomologist 
S. C. CHANDLER, B.S., Associate Entomologist 
Wituts N. Bruce, Ph.D., Associate Entomologist 
NorMAN C. GANNON, Ph.D., Associate Ento- 
mologist 
Joun M. Wricut, Ph.D., Associate Entomologist 
PauL SurRANYI, Ph.D., Assistant Entomologist 
W. H. Luckmann, M.S., Assis!ant Entomologist 
Ronacp H. Meyer, B.S., Assistant Entomologist 
Joun W. Matteson, B.A., Field Assistant 
ROBERT SNETSINGER, M.S., Field Assistant 
Sue E. Watkins, Technical Assistant 
H. B. Petty, Ph.D., Extension Specialist in En- 
tomology* 
STEVENSON Moore, III, Ph.D., Extension 
Specialist in Entomology* 
JouHN ARTHUR LOwE, B.S., Research Assistant* 
Mouwan Rao, M.S., Research Assistant* 
CLARENCE E. Wuire, B.S., Research Assistant* 
LouIsE ZINGRONE, B.S., Research Assistant* 
Section of Faunistic Surveys and Insect 
Identification 
a eg Ph.D., Systematic Entomologist and 
ea 
MILton W. SANDERSON, Ph.D., Associate Tax- 
onomist 
Lewis J. STANNARD, JR., Ph.D., Assistant Tax- 
onomist 
Puitie W. Situ, Ph.D., Assistant Taxonomist 
Leonora K. Gioyp, M.S., Laboratory Assistant 
Tuomas E. Moore, M.S., Technical Assistant 
BARBARA Gutowsky, M.A., Technical Assistant 
Section of Aquatic Biology 
GrorGE W. BENNETT, Ph.D., Aquatic Biologist 
and Head 
WILuiaM C, StTarRETT, Ph.D., Associate Aquatic 
Biologist 
R. W. Larimore, Ph.D., Associate Aquatic Bi- 
ologist 
Dona.Lp F. HANSEN, Ph.D., Assistant Aquatic 
Biologist 
Rosert D. Crompton, Field Assistant 
LEONARD DurRHAM, M.S., Research Assistant* 
WiruiaM F. Cuivpers, B.S., Technical Assistant* 
Pathology 
Je ene CarTER, Ph.D., Plant Pathologist and 
ea 
J. L. ForsBerc, Ph.D., Associate Plant Pa- 
thologist 
G. H. Borewe, M.S., Assistant Plant Pathologist 
R. J. Campana, Ph.D., Assistant Plant Pathol- 
ogist 
I. R. ScHNEmpER, Ph.D., Assistant Plant Pa- 
thologist 
E. B. Hime tick, M.S., Assistant Plant Pathologist 
Rosert A. Evers, Ph.D., Assistant Botanist 
RoveniA F. Fitz-Geratp, B.A., Technical 
Assistant 
Harry J. KRuEGER, B.S., Research Assistant 
James D. Bitspruck, M.S., Research Assistant* 
Section of Game Research and Management 
T. G. Scott, Ph.D., Game Specialist and Head 
RavpH E. YEATTER, Ph.D., Game Specialist 
F. C. BELLROSE, B.S., Associate Game Specialist 
H. C. Hanson, M.S., Assistant Game Specialist 
J. S. JorpAN, Ph.D., Assistant Game Technician 
Ross J. Mitter, M.S., Field Ecologist 
FRANCES D. RosBINS, B.A., Technical Assistant 
VIRGINIA A. WHIPPLE, Technical Assistant 
Joun M. ScHILLING, Field Assistant 
WILLIAM B. ROBERTSON, JR., Ph.D., Research 
Assistant* 
JAMES OpSAHL, M.S., Field Assistant®* 
RosBert H. Broucu, B.S., Field Assistant* 
Section of Publications and Public Relations 
James S. Ayars, B.S., Technical Editor and Head 
BLANCHE P. YounG, B.A., Assistant Technical 
Editor 
WILiiAM E. Criark, Assistant Technical Photog- 
rapher 
Miran Dosrovic, B.A., Technical Assistant 
Technical Library 
RutH R. Warrick, B.S., B.S.L.S., Technical 
Librarian 
Oca E. Grimincer, B.A., Assistant Technical 
Librarian 
CONSULTANTS: HERPETOLOGY, Hopart M. Situ, Ph.D., Associate Professor of Zoology, University of Illinois; 
PARASITOLOGY, NORMAN D. Levine, Ph.D., Professor of Veterinary Parasitology and of Veterinary Re- 
search, University of Illinois. 
_ *Employed on co-operative projects with one of several agencies: Illinois Agricultural Extension Service, 
Illinois Department of Conservation, United States Army Surgeon General's Office, United States Depart- 
ment of Agriculture, United States Fish and Wildlife Service, United States Public Health Service, and others. 
This paper is a contribution from the Section of Applied Botany and Plant Pathology. 
(13164—4M—3-55) 
fit Armen we 
