171 



This is attributed to the action of the arsenical dip, which, after 

 continuous treatment, permeates the outer layers of the hides of 

 cattle, and thus becomes absorbed by ticks and biting flies. It is 

 beUeved that Glossina may also be controlled by this means. 



Mason (C). Report of the Government Entomologist. — Ann. Rept. 

 ,^ Deft. Agrie. Nyasaland for the Year ended 31st March 1916, 

 C^ Zomha, 30th June 1916, pp. 19-22. [Received 4th September 

 1916.] 



On account of the outbreaks of trypanosomiasis among transport 

 cattle on the Zomba-Blantyre road investigations were begun to 

 determine whether a fly area existed in the highlands, from which 

 infection could be carried to the cattle. The investigations are still 

 incomplete. Glossina brevipalpis was probably responsible for the 

 cases of trypanosomiasis at Mlanje. Four or five species of Stomoxys 

 and a number of Tabanids were collected. A Bembecid wasp was 

 predaceous on Tabanus denshami, T. taeniola, T. taeniola var. variatus 

 and T.fuscipes. An Asilid was noted to attack T.fuscipes, and another 

 Asilid, Alcimus rubiginosus, attacked Chrysops woodi. Two species 

 of SiMULiiDAE were taken on cattle and a third on cattle and man. 

 HippoBOSCiDAE included :~Hippobosca fulva on impala and bushbuck, 

 Lynchia maura on ring-dove, and Echestypus paradoxus on bushbuck 

 and warthog. 



NoBBS (E. A.) & Sinclair (J. M.). Compulsory Dipping.— JRAtxiesia 

 Agric. Jl., Salisbury, xiii, no. 4, August 1916, pp. 466-473. 



The Compulsory Dipping Ordinance of 1914 is now in operation on 

 about 600 out of the 2,000 occupied farms in the country, including 

 parts of the native districts of Salisbury, Mazoe, Hartley, Marandellas, 

 Umtali and Melsetter. The necessity for the more general practice of 

 regular dipping is emphasised. Explanatory details and methods of 

 procedure in any area to which it is desired to apply the Ordinance are 

 given. Attention is called to the fact that dipping in terms of the 

 Ordinance implies the use of an approved solution of a certain strength 

 and purity. The intervals between each dip should not exceed a week 

 throughout the six months during which ticks are most abundant. 

 Financial assistance in the matter of erection of dipping tanks by 

 private individuals may be provided by the Legislative Council or by 

 the Land Bank. The erection of public dipping tanks at centres 

 through which many cattle pass is not advocated, since such a tank 

 would not ensure regular dipping and would involve the contact of 

 clean with infected animals, while owners would be likely to retain 

 milch cows, calves and sick animals at home. 



Sinclair (J. M.). Veterinary Report.^Rhodesia Agric. JL, Salisbury, 

 xiii, no. 4, August 1916, pp. 546-549. 



Outbreaks of African coast fever occurred during May in the Mazoe 

 and Melsetter districts. In the Mrewa district a further outbreak 

 occurred, involving the death and destruction of 51 head of cattle. 



