Notes. 799 



a reliable precaution against this pest. The Chief Entomologist of 

 Egypt has stated that worms have been found to survive in seed for 

 at least two and a halt years. These remarks may help the public 

 to understand why the Department of Agriculture has become 

 extremely particular about the introduction of cotton seed. Any one 

 who brings cotton seed into the country in ignorance of the regula- 

 tions on the subject, or who receives any uninspected foreign cotton 

 seed by post or otherwise, is earnestly urged to keep such seed tightly 

 enclosed and to communicate at once with the Department. 

 N^egligence may be the means of causing incalculable loss to South 

 Africa. 



Tsetse Fly Investigations. 



The Minister has instructed the Division of Entomology to station 

 an Entomologist without delay in the Empangeni area of Zululand to 

 conduct a special investigation of tsetse flies. Arrangements are 

 being made accordingly. The immediate necessity for the projected 

 investigation is the very serious loss of stock through Nagana that has 

 been experienced by recent settlers under a Government scheme. It 

 so chances, however, that the Imperial Government a short time ago 

 approached the CTnion Government to learn if the latter w^ould be 

 prepared to co-operate in a plan to have the bionomics of tsetse flies 

 studied on common lines, by special Entomologists, to be stationed in 

 suitable localities in six widely separated " fly belts," in as many of 

 the British countries of Africa. It w^as suggested one station be in 

 Nyasaliind, one in Southern Rhodesia, and one in Zululand. The 

 Union Government agreed to support the project, and undertook to 

 conduct an investigation in accordance with' the plan in Zululand at 

 its sole expense and to contribute a substantial sum annually to a 

 common fund for general purposes. If the Imperial sclieme comes to 

 fruition, the work now about to be started in Zululand will therefore 

 be conducted under the great advantages to be derived from similar 

 investigations, simultaneously carried on at other places under the 

 same general direction. The work of the several stations would he 

 co-ordinated through the Imperial Bureau of Entomology (London), 

 which would probably have an experienced tsetse fly investigator visit 

 each periodically. Each station, moreover, would be kept informed 

 of the progress being made at tlie others. It is expected that the 

 investigations will extend over Ave years, and it is hoped they will 

 disclose facts, through the knowledge of which tsetse fly transmitted 

 diseases of man and the lower animals may be successfully suppressed. 



Preventing Wastage in Citrus Fruit Shipments. 



During the past few months investigations were conducted into 

 the cause of wastage in our export citrus trade. These experiments 

 were carried out by Miss Thomson, B.A. (Cape), M.Sc. (Lojid.), 

 F.L.S., at Pretoria, and Mr. Putterill, M.A. (Cape), Government 



