94 MISC. PUBLICATION 198, U.S. DEPT. OF AGRICULTURE 
Wesster, F. M.—Continued. (1196) 
THE VALUE OF INSECT PARASITISM TO THE AMERICAN FARMER. U.S.Dept.Agr. 
Yearbook 1907: 243-246, 252, 253, illus. 1908. 
Popular discussion of relation of Polygnotus and fly. 
(1197) 
THE PRINCIPAL INJURIOUS INSECTS OF THE YEAR 1907. U.S.Dept.Agr. Year- 
book 1907: 542. 1908. : 
Reports on outbreak of fly in Oklahoma, Kansas, and western Washington; 
parasites scarce. 
(1198) 
VALUE OF PARASITES IN CEREAL AND FORAGE CROP PRODUCTION. 
U.S.Dept.Agr. Bur. Ent. Bull. (n.ser.) 67: 95. 1907. 
Résumé of data on more important fly parasites. 
(1199) 
[POLYGNOTUS AND THE HESSIAN FLY] VALUE OF INSECT PARASITISM TO THE 
AMERICAN FARMER. U.S.Dept.Agr. Yearbook 1907: 2438-246, illus. 1908. 
Control of fly in autumn by Polygnotus hiemalis Forbes; peculiar breeding 
habits of this parasite. 
(1200) 
INSECTS AFFECTING CEREAL AND FORAGE Crops. U.S.Dept.Agr. Yearbook 
1907: 542-548. . 1908. 
Brief note on outbreaks of hessian fly in Oklahoma, southern Kansas, and 
western Washington. 
(1201) 
INSECTS AFFECTING CEREAL AND FORAGE Crops. U.S.Dept.Agr. Yearbook 
1908: 568-570. 1909. 
Fly outbreak in Kansas, Oklahoma, and Oregon; injury; experimental 
sowings; fly attacking quack grass (Agropyron smithit), p. 568. 
(1202) 
SOME THINGS THAT THE GROWER OF CEREAL AND FORAGE CROPS SHOULD 
KNOW aBouT INSECTS. U.S.Dept.Agr. Yearbook 1908: 367-388, illus. 
1909. 
Fully developed fly is noninjurious; method of reproduction, pp. 371-372, 
373; influence of weather, pp. 385-387. 
(1203) 
THE FARMER AND THE HESSIAN FLY. Breeder’s Gaz. 66: 189. 1914. 
Brief popular discussion. 
(1204) 
HESSIAN FLY. U.S.Dept.Agr. Farmers’ Bull. 611, 39 pp., illus. 1914. 
Origin; spread throughout the United States; life history; control, pp. 
12-16. 
(1205) 
HOW THE FARMER CAN DETECT THE HESSIAN FLY IN HIS WHEATFIELDS IF IT 
IS PRESENT. Weekly News Letter to Crop Correspondents 2 (12): 1, 
illus. 1914. 
Brief popular discussion. 
(1206) 
HESSIAN FLY. U.S.Dept.Agr. Farmers’ Bull. 640: 20 pp., illus. 1915. 
Early history in America; description; where to find the different stages; 
life history; distribution; food plants; effect of larva on plant; meteorological 
effects; natural enemies; control. 
(1207) 
FIGHT HESSIAN FLIES. FLY NOW DAMAGING WHEAT—HOW TO ELIMINATE 
IT FROM NEXT YEAR’S CROP—COOPERATION BETWEEN FARMERS ESSENTIAL. 
Weekly News Letter to Crop Correspondents 2 (48): 1-8, illus. 1915. 
Brief statement of injury 1914-15; recommended control; organization of 
control campaigns; map indicating safe sowing dates; illustrated seasonal 
history chart. 
