21 



African Wild Silk. — Bull. Imp. Inst., London, xiv, no. 2, April-June 

 1916, pp. 167-180. 



The only silkworms of importance found in a wild state in Africa 

 belong to the Notodontid genus Anaphe. The chief species occurring 

 in British territory are A. infracta in Nigeria and Uganda ; A. venaia 

 in Nigeria and the Gold Coast ; A. moloneyi in Nigeria ; A. ambrizia 

 in Uganda ; A. panda and A. reticulata in Natal. The existing 

 methods of collection, cleaning and exportation of the product involve 

 so much time and expenditure as to render the success of the industry 

 very doubtful. If, however, the cost of production were reduced by 

 domesticating the silkworm, which can be done successfully, and all 

 chrysalises, twigs, etc., removed from the silk by native labour, the 

 clean product could then be compressed in bales for export, and if 

 carried out on a sufficiently large scale, there seems to be no reason 

 why a new industry, contributing to the welfare of several British 

 African possessions, should not be established. 



McIndoo (N. E.). Effects of Nicotine as an Insecticide. — Jl. Agric. 

 Research, Washington, D.C, vii, no. 3, 16th October 1916, 

 pp. 89-122, 3 plates. 



Owing to the high price of nicotine attempts have been made to 

 find a substitute for it, and in order to do so, its physiological effects as 

 an insecticide must be studied. The following investigations were 

 carried out with this object. The method followed was to compare 



