20 MISC. PUBLICATION 198, U.S. DEPT. OF AGRICULTURE 
CrippLe, N.—Continued. (234) 
HESSIAN FLY AND WESTERN WHEAT-STEM SAW-FLY IN MANITOBA, SASKATCHE= 
WAN AND ALBERTA—HESSIAN FLY (MAYETIOLA DESTRUCTOR SAY). Canada 
HKxpt. Farms Bull. 11: 7515,,. 1915. 
History of introduction into western Canada; description; life history; 
injury and how recognized; food plants; means of distribution; natural 
enemies; relation to climatic conditions; control. 
(235) 
SOM? STEM MAGGOTS ATTACKING GROWING GRAIN. Agr. Gaz. Canada 3 (6): 
504-507. 1916. 
Injury by fly compared with that by other indicated insects. 
(236) 
PRECIPITATION IN RELATION TO INSECT PREVALENCE AND DISTRIBUTION. 
Canad. Ent. 49: 79. 1917. 
Influence of dry and wet weather on development of fiy. 
(237) 
SOME INSECT PROBLEMS OF THE PRAIRIE PROVINCES. Ent. Soc. Ontario, 
Ann. Rpt. 49: 32-35. 1919. 
Habits of fly. 
(238) 
THE COMMON INSECTS AND THEIR CONTROL. In Bracken, J., Crop Production 
in Western Canada, 423 pp., illus. Winnipeg, Canada. 1920. 
A popular account of the fly and its control, pp. 372-373. 
. (239) 
HESSIAN FLY IN THE PRAIRIE PROVINCES. Canada Dept. Agr. Pamphlet 
30 (n.s.), 7 pp., illus. 1923. 
Introduction; description; life history; host plants; control; weather 
factors; parasites. 
Cutt, A. (240) 
HESSIAN FLY. Farmers’ Cabinet 6: 69. 1841. 
Observations on experiments for control. 
CunniINGHAM, C. C. See Catuu, L. E. 
Curtis, J. (241) 
OBSERVATIONS ON THE NATURAL HISTORY AND ECONOMY OF VARIOUS INSECTS. 
AFFECTING. THE CORN CROPS, INCLUDING * * * THE HESSIAN FLY 
(CECIDOMYIA DESTRUCTOR). Jour. Roy. Agr. Soc. England 6: 137-139. 
1845. 
Sketch of history; discovery i in England; description and habits; parasites. 
ae (242) 
CECIDOMYIA DESTRUCTOR, SAY—THE AMERICAN WHEAT-MIDGE. In Farm 
Insects: Being the Natural History and Economy of the Insects Injuri- 
ous... With Suggestions for Their Destruction. 528 pp., illus. 
Glasgow, Edinburgh, [etc.] Blackie & Son. 1860. 
Account of fly (compiled chiefly from Koller), pp. 258-260. 
Curtiss, C. F. (243), 
INSECT OUTBREAKS. lowa Agr. Expt. Sta. Ann. Rpt. 1922: 41. 
Brief report of injury.. 
(244) 
HESSIAN FLY CONTROL. Iowa Agr. Expt. Sta. Ann. Rpt. 1923: 43. 
Figures on damage in Iowa in 1922; data on extent of cooperation work. 
(245) 
IOWA HESSIAN FLY TAX AND MENACE. lowa Agr. Expt. Sta. Ann. Rpt. 
1924: 43-44, 
Estimates of losses by fly in Iowa 1922-23; reports from certain counties. 
sf, veers a tai sain mama 
