32 MISC. PUBLICATION 198, U.S. DEPT. OF AGRICULTURE 
Fuint, W. P., Turner, C. F., ano Davis, J. J. (390) 
METHODS IN ENTOMOLOGICAL FIELD EXPERIMENTATION. Jour. Econ. Ent. 12: 
178-183. 1919. 
Discussion of methods of making comparative counts of infestation; 
method of taking yields; method of estimating injury; continuity of investi- 
gations. 
, and LaRRIMER, W. H. (391) 
HESSIAN FLY AND THE ILLINOIS WHEAT CROP. III. Dept. Registr. and Ed. 
Div. Nat. Hist. Survey Bull. 17 (11): 363-385, illus. 1928. 
General discussion; life histroy; control; date of seeding experiments; 
results in Winnebago, Boone, La Salle, Bureau, Hancock, Champaign, Ma- 
coupin, Marion, Randolph, Jackson, and Pulaski Counties; summary. 
(392) 
SYMPOSIUM: THE EFFECT OF THE 1930 DROUGHT UPON INSECT POPULATION. 
THE EFFECT ON CEREAL CROP INSECTS. Jour. Econ. Ent. 24: 654. 1931. 
Résumé; infestation light. 
, and Mercatr, C. L. (393) 
INSECTS MAN’S CHIEF COMPETITORS. 133 pp., illus. Baltimore. 1932. 
Popular résumé of hessian fly, pp. 106-111; probable origin; life history; 
control. 
See also Mrtca.r, C. L. 
Forses, E. B. (394) 
HESSIAN FLY IN MINNESOTA. Farm Students’ Rev. 6 (9): 1383-134. 1901. 
Observations on injury in Minnesota; life history; control measures. 
(395) 
HESSIAN FLY. Minn. Agr. Expt. Sta. Press Bull. 18, 11 pp., illus. 1901. 
Outbreak in Minnesota; life history; remedies; effect of weather; parasites. 
Forsss, S. A. (396) 
[HESSIAN FLY.] Ill. State Ent. Ann. Rpt. 12: 6, 1888; 18: 9, 22, 24, 36, 
1884; 14: 3, 1885. 
Increase in southern I[llinois (Rpt. 12); report on outbreak in southern 
Illinois; brief comparison of habits of wheat bulb-worm with fly; occurrence 
of fly in Du Quoin County, Ill. (Rpt. 18); and note on decreasing of fly 
by parasites (Rpt. 14). 
(397) 
INVESTIGATING GRAIN INSECTS. Prairie Farmer 56 (23): 355. 1884. 
News item regarding investigation by W. H. Garman of fly in the Wabash 
Valley; injury by fly in Marshall County, Il. 
(398) 
THE ENTOMOLOGICAL RECORDS FOR 188i.—THE HESSIAN FLY (CECIDOMYIA 
DESTRUCTOR SAY). Misc. Essays on Econ. Ent. 23: 14-15, 16-17, 24. 
1885. 
Infestation in southern Illinois; two important items in life history; 
prevention; parasites; fly and wheat vs. plant louse and corn. 
(399) 
CONTRIBUTION TO A KNOWLEDGE OF THE LIFE HISTORY AND THE PARASITES 
OF THE HESSIAN FLY. Ill. State Ent. Ann. Rpt. 14 : 38-50, 119-120, 
illus. 1885. 
Observations during 1883-84 on life history of fly; detailed description of 
parasites (Semiotellus destructor Say; Pteromalus pallipes, n.sp.; Pteromalus (?) 
fulvipes,n. sp.: Tetrastichus carinatus, n. sp.), with calendars on life history. 
(400) 
NOTES OF THE PAST YEAR’S WORK. Canad. Ent. 18: 176. 1886. 
Notes on fly in southern Illinois. 
(401) 
[HESSIAN FLY.] Ent. Amer. 2:173. 1886. 
Note on hibernation in southern Illinois. 
