- 72 - 
51. HOl-'MD, L. 0. 
1924. Some, recent devclopraoiats in inosquito vrork. IT. J. 'ilosqu.ito 
Eztcrinin. Assoc. Proc. Ann. ilocting 11: 3-19. 
52. JACK, H. \1. 
1925. Rico in ilr.lajra. IX. Posts r.nd Diseases. Ilalayr-n 
Agr. Jour. 11: 157-151. 
53. ,--d SAl^IDS, ". ':!. 
1932. Cotton eiqporimcnts in Malava. ilalayr^i Ar^J^« Jour. 
10: [2-x8]-253. . 
54. ICSLSALL, A., SPITTALL, J. P., G0HHAI4, H. P. o^id IJALIIER, &. P. 
1925. Derris as an insecticide. Snt. Soc. of Ontario, 
Ann. Ropt, 55: 24—10. Toronto. 
55. KOPP, A. 
1924. Los derris insecticides. Rev. 3ot. A-ppl. et A^r. Colon. 
3vll, 4 (34): 4-00-402. 
56 . LSIj!Fi-Iii.iTk5 , S . 
1927. De koolcultuur of de karo-hoogvlarte. Land":-ou\.' 2: 
627-54^c. 
57. L3:-:ilT, L. ■ 
1923, Derris elliptica Bentli. ( Pongania r.'iont.ana 3i.) Dis 
Pfeilgifte. 517 op., illus. Leipzir;. 
53 . LI^Tli: 
1928. Traitenent de 1' h-noodermose du ooeuf. Ann. Med. Yet. 
75 (5): 202-204.^ 
59. LLOYD, L. 
1920. The hacits of the t^lasshouse tomato moth, Hadena (Polia) 
oleracea , and its control. Ann. Appl. Biol. 7: 65-102 
50. MacDOUC-ALL , H. S. 
1924. Insects and other pests of 1923. Plifchland and Afcr. Soc. 
Scot. Trans. (5)" 55: 100-140. 
