85 



naphthaline, -loz., soap, lib., water, 4 gals.) caiuiot be recom- 

 mended for camels, as it causes severe blistermg of the skin. It is said 

 to protect cows agamst Stomoxys calcitrans and Lyperosia irrikms for 

 a week. On camels, it was efficacious against Tabanids for about 

 12 hours. Citronella oil prevents Tabanids and Stomoxi/s from 

 attacking for a few hours, but has no repellent action after 17 hours. 

 God-liver oil does not prevent flies of either genus from attacknig 

 camels. Aniseed oil was found to have no repellent action against 

 Tabanids 2^ hours after application. It has a slight repellent action 

 against Stomoxys, but only for a very short time. The application of 

 only one pint of aniseed oil was found to cause great restlessness in the 

 camels. Castor oil had no effect against either Stomoxys or Tabanids, 

 when only one pint per camel was used ; 4 pints per camel prevents 

 attack for three days and gives partial immunity for about two days 

 longer. This oil is liable, when exposed to the air, to thicken and form 

 a varnish-like film on the skin, but so far no harmful effect has been 

 observed. This treatment is too expensive to be of practical use. 



Camels actually suffering from surra were treated with arsenic alone 

 or a combination of arsenic and soamin with excellent results. Ponies 

 were found to be liable to surra infection from camels. 



ViLLENEUVE (J.)- Description of a new Species of Stomoxtjs (Diptera) 

 from South Africa. — Antuils S. African Museum, Cape Town, xv, 

 no. 6. 8th December 1916, pp. 453-454. [Received 24th April 

 1917.] 



Stomoxys transvittala, sp. n., is described from Natal. 



Maynard (G. D.) The Trypanosomes of Sleeping Sickness ; being a 

 Study of the Grounds for the alleged Identity of T. brucei with those 

 causing Disease in Man in Nyasaland. — S. African Inst. Med. Res., 

 Johannesburg, no. 6, 17th December, 1915, 39 pp. [Received 

 30th April 1917.] 



This paper criticises the conclusions arrived at by the Sleepmg 

 Sickness Commission of the Royal Society, which, in the author's 

 view, do not rest upon a sure foundation of fact. In analysing the 

 morphology and measurements of the various strains of trypanosomes, 

 of which a number of charts are given, the author finds that, while the 

 dimorphic trypanosomes, T. rhodesien.se, T. brucei, T. gambiense and 

 the trypanosomes of Nyasaland sleeping sickness and of the Nyasaland 

 wild game strain have certain features in common, at present no 

 valid evidence as to the identity or otherwise of T. brucei and the 

 trypanosome causing disease in man in Nyasaland can be drawn from 

 length-measurement-distributions ; at present the only valid argument 

 in favour of the identity of these bloo I parasites is to be drawn from 

 experiments in regard to their pathogenicity for animals. There is some 

 evidence to suggest that there is less similarity between the Nyasaland 

 human strain and T. brucei than between T. rhodesiense of Stephens 

 and Fantham and T. gambiense as recorded by these authors. The 

 author considers that the immunity experiments carried out by the 

 Commission and others negative the suggestion of the identity of 

 T. brucei, the Nyasaland human strain, the Nyasaland wild G. morsiians 

 strain and T. rhodesiense. There is no evidence at present from the 



