AN ANNOTATED BIBLIOGRAPHY OF THE HESSIAN FLY 19 
Cory, E. N. (221 
INSECTS OF 1912—HESSIAN FLY (MAYETIOLA DESTRUCTOR). Md. State Hort. 
Soc. Rpt. 15: 189-190. 1912. 
Outbreak in Maryland; safe dates for sowing. 
(222) 
INSECT PESTS OF 1914. Md. State Hort. Soc. Rpt. 17: 104-112. 1915. 
Fly continued injurious in Maryland.; 
(223) 
HESSIAN FLY. Md. Agr. Ext. Serv. Bull. 7,4 pp., illus. 1917. 
Popular résumé; safe sowing dates for Maryland. 
See also Symons, T. B 
Cosena, A. (224) 
REPORTS ON INSECTS OF THE YEAR: DIVISION NO. 3. TORONTO DISTRICT. 
Ent. Soc. Ontario, Ann. Rpt. 51: 12-18. 1921. 
Fly one of the most serious pests of the year. 
CoTToN, E. C. (225) 
HESSIAN FLY. Ohio Dept. Agr. Off. Bull. 11 (7): 5. 1919. 
Fly situation in Ohio in 1918; infestation; fly-free dates; reports on date of 
sowing plats prepared by T. H. Parks. 
26) 
WHEAT—INSECT SURVEY FOR 1919. Ohio Dept. Agr. Off. Bull. 12 (7): 4-9, 
illus. 1919. 
Discussion of effect of various dates of sowing in relation to fly-free dates; 
infestation records for various counties; cooperation stressed, with examples; 
map showing fly-free dates for Ohio. 
(227) 
WHEAT INSECT SURVEY FOR 1919. RECOMMENDATIONS FOR HESSIAN FLY, ETC. 
Ohio Agr. Expt. Sta. Monthly Bull. 4: 240-245, illus. 
Infestation in 1918; fly-free dates; cooperation. 
(228) 
INSECT INFESTATION OF WHEAT FIELD. SURVEY OF THIRTY-FOUR OHIO 
COUNTIES SHOWS DANGER OF HESSIAN FLY. Ohio Farmer 164: 115, illus. 
1929. : 
Report on cooperative work by counties; details of injury. 
; (229) 
OHIO WHEAT FIELD INSECT SURVEY FOR 1929. Ohio Agr. Expt. Sta. Bimo. 
Bull. 140 (Sept.—Oct. 1929): 153-155. 1929. 
Annual report on joint project of the Ohio Agricultural Experiment 
Station, the Ohio State University, and Ohio Department of Agriculture 
on fly population in various parts of Ohio; disease; maps showing infesta- 
tion and free seeding dates. 
CRIDDLE, N. (230) 
INSECTS INJURIOUS TO GROWING GRAIN. Nor’West Farmer 26: 1157. 
1907. 
Description of fly; appearance of infested grain; remedial measures. 
— oe (231) 
INJURIOUS INSECTS OF 1911 AT TREESBANK, MANITOBA. Jour. Econ. Ent. 5: 
248-252. 1912. e 
Theory on life history; small damage to grain during 1911, pp. 248-249. 
5 (232) 
INSECT PESTS OF SOUTHERN MANITOBA DURING 1912. Ent. Soc. Ontario, 
Ann. Rpt. 43 (36): 97-100. 1913. ; 
Injury by fly in Alberta, pp. 97—98. 
(233) 
THE VALUE OF SOME MAMMALS AND BIRDS AS DESTROYERS OF NOXIOUS 
INSECTS. Ottawa Nat. 28 (9): 124. 1914. 
Abundanee of fly scarcely influenced by birds. 
