203 



to complete the meal. The healthy animals used were most care- 

 fully proved to he free from trypauosomes. Three positive ex- 

 periments resulted and are described in detail. One was a 

 monkey, the second a horse and the third a horse. Attempts to 

 induce the flies to feed on healthy and on infected animals kept 

 tog'ether in a large screened cage failed, the flies dying- in a few 

 days when kept within the enclosure. Female Tabanids to the 

 number of 2,087 were liberated in this cage between 9th November 

 and 22nd December and 14 months afterwards the exposed carabao 

 remained normal. Two guineapigs inoculated with its blood 

 were alive and negative on 12th April, 19111 Experiments were 

 made to determine the possibility or otherwise of the hereditary 

 transmission of trypanosomes in these flies. The results were 

 negative. Further attempts were made to transmit surra by other 

 means than biting. A highly infected guineapig was used to 

 contaminate the flies, and a portion of the skin of healthy and 

 infected animals was abraded with a razor and the flies applied 

 individually in tubes. The flies were permitted to lap the blood 

 from the abrasion on the infected animal for a minute or less, 

 and then transferred to the healthy animal where it was induced 

 to apply its labellum for from five to ten minutes. The results 

 of all the trials were negative, although it was ascertained that 

 typical trypanosomes were present upon the labellum of one of 

 the flies and in the stomach of another fly immediately after the 

 experiment. 



Experiments as to the length of time T . striatvs can harbour 

 infective trypanosomes, showed that though organisms indis- 

 tinguishable from those of surra could be found in the flies 30 

 hours after biting an infected animal, after 10 hours the flies 

 ceased to be infective. 



TowNSEND (C, H. T.). The Vector of Verruga, Fldehotoinus 

 verrucarum, sp. nov. — Insecutor Inscitiae Menstruus, 

 Washington D.C., i, no. 9, Sept. 1913, pp. 107-109, 1 plate. 



The author gives a full description of this new Peruvian 

 Phlehotoinus , and in a supplementary note adds that since writing 

 the paper, the successful transmission of verruga by this species 

 has been accomplished in a dog, which was infected on 11th July, 

 the eruption appearing on 17th July. {See this Review, Ser. B. 

 I., p. 163.) 



Thompson (D.). Preliminary Note on Bed-bugs and Leprosy. — 

 Brit. Med. Journ, 4th October 1913, p. 849. 



The author refers to articles by Sander and Long (B.M.J, ii, 

 1911, pp. 469-470), in which it was stated that a large percentage 

 of bed-bugs experimentally fed on lepers, or caught within their 

 dwellings, contained acid-fast leprosy bacilli; whilst those caught 

 in the dwellings of healthy people contained none; the presump- 

 tion being that the bed-bugs caught played an important part in 



