-108- 
223. 0G-UR0, T., and KIMURA, C. 
1932. An attempt to control and field observations on Oscinis 
oryzella Mats. (Preliminary report) Jour. Plant Protect. 
19: 436-442. [In Japanese. Abstract in Rev. Appl. ^nt. 
(A) 20: 542.] 
224. OHIO AGRICULTURAL EXPERIMENT STATION 
1936. Entomology. Ohio Agr. Expt. Sta. Ann. Rpt. (1935.) 
Bui. 561: 43-51. 
225. PAPUAN, D\ C., BISHCPP, F. C, LAAKE, E. W. , COOK, P. C. , and RQARK.R. C. 
1927. Chemotropic tests with the screwworm fly. U. S. Dept. Agr. 
Pul. 1472, 32 pp. 
226.. LAAKE, E. W. , BISHOPF, F. C. , and ROARK , R. C. 
1928. Tests of blowfly baits and repellents during 1926. U.S. 
Dept. Agr. Tech. Bui. 80, 15 pp. ■ 
227. PATTERSON, N. A. 
1935. Indices of toxicity for various poisons to Droso-ohila 
Ampelo-ohila Loew, Ent. Soc. C n tario -Ann. Rpt. (1934) 
65: 78-80. 
228. PEARSON, A. 'M. 
1935. The role of pine oil in cattle fly sprays. Del. Agr. Expt. 
Sta. Bui. 196, Tech. XVI, 63pp., illus. 
229. PEDRETTI, L. von 
1936. Zur Bekampfung der Dasselplage 1936 in Oberbayern und im 
Allgau. (Einwaschversuche am- H*6henvieh mit derrishaltisen 
Waschmitteln.) Munchen. Tierarztl. Wehnschr. 87 (45)1 
529-534. ''* "'» 
230. PEN Id;- S. 3. and COMPANY ' 
1933. Derris, the New Safe Insecticide. 14 pp.,, illus. New York. 
(Fourth ed. 1936) . 
231. PETERS, H. * 
1933. Versuche zur Bekampfung des Dasselbefalls bein Rinde. V . 
Beitrag. Fliegenabwehr , Immunisierung, medikament£se 
Abtotung der Dasseln mit S92 Prapcraten, Delicia und 
wasserigen Derrisextrakten. 46 pp. Hannover. (inaug. 
Diss.) 
