- 32 - 
(48) JONES, M. P. 
1939. 4-H Club Insect Manual. U. S. Dept. Agr., Mice. Pub. 
318, 63 pp. , illus. 
(49) JONES, S. E. 
1938. Life history and control of Phtfaia pic ta Drury on tomatoes. 
Jour. Econ. Ent. 31: 127-120. 
(50) KANSAS AGRICULTURAL EXPERII lf SNT STATION 
1934, Seventh biennial report of the director, Kansas Agricul- 
tural Experiment Station, 1932-34, 147 pp. 
(51) KEAFNS, H. 0. II., MARSH, P. !T, r . , and MARTIN, H. 
1936. Combined washes. Frogress report - II. Bristol 
[England] Univ., Agr. and Hort. Pes. Sta. Ann, Ept. 
1935: 37-48. 
(52) MARSH, R. W. , and PEAPCE, T. J. P. 
1933. Experiments with combined insecticide- fungicide sprays 
for apples. Progress Fept. Bristol [Engiland] Univ., w 
Agr. and Port. Pes. Sta. Ann. Rpt. 1932: 68-85. * 
(53) KELSALL, A., SPITTAL, J. P., GORHAM, P. P., and WALKEF, G. P. 
1926. Derris as an insecticide. Ontario Ent; Soc. Ann. Rpt, 
(1925) 56: 24-40. 
(54) KOPP, A. 
1924. Les derris insecticides. Rev. de Dot. Appl. et d'Agr. 
Colon. Bui. 4: 400-402. 
(55) LAAN, P. A. van der 
1936. Verslag ven de Negen-en-Zestigcte Wintervergadering der 
nederlandsche entomclogische Vereeniging, Amsterdam, 
February 25, 1936. Tijdschr. v. Ent. 79: 52-58. 
(56) LEEKANS, S. 
1931, De Thans bekende Ziekten en Plagen van Orchide'n in 
Nederlandsch-Indie' en hare Bestrijding, 24 pp., 
illus. Bandoeng, N. V. Mij. Vorkink. [abstract in 
Rev. Appl. Ent. (A) 20: 249.] 
(57) Le PE T LEY, P. H. 
1933. Field spraying mth undiluted paraffin extracts of 
pyrethrum against Antestia and Ly gu s on coffee in 
Kenya. Ent. Pes. Bui". 2~4 (l): 1-32, 
(58) Mc DANIEL, E. I. 
1934, Chrysanthemum lace-bug. Mich. Agr. Expt". Sta, Quart, 
Bui. 17 (l): 23-24. 
(59) McINDOO, IT. P., SIEVEPS, A. F., and ABBOTT, Yf. S. 
1919. Derris as an insecticide. Jour. Agr. Pes. 17: 177-200. 
