13 



to the parasites in the stomach. The heavy infestation of flies by 

 Habronema produces a considerable degree of mortality among them ; 

 this fact renders the parasites to a certain extent beneficial. 



Bachmann (A.) . Notes sur les Moeurs des Anopheles et leurs Conditions 

 de Gites dans la Ville de Famailla (Tucuman, Repubhaue Argentine). 



—Bull. Soc. Path. Exot., Paris, xiv, no. 8, 12th October 1921, 

 pp. 506-511, 3 plates. 



The preliminary results are recorded of an investigation, under the 

 Government of Tucuman, into the local Anopheline conditions in the 

 town of Famailla, of some 2,500 inhabitants, which has been selected 

 for a demonstration of anti-malarial work. Anopheles pseudopuncti- 

 Pennis was found abundantly in all the houses at all times of day and 

 in all weathers, the average number being about 15 in each room. 

 Both sexes were found, and it is evident that fertilisation can occur in 

 houses, that the whole life-cycle can take place under domestic 

 conditions, and that the fertilised female only leaves the vicinity of 

 the house for oviposition. A small number of A. argyritarsis {albitar- 

 sis) was also present in the houses, but all were males ; this species, 

 however, must undoubtedly be considered in anti-malarial work. 

 On warm summer days Culex spp. are abundant around the houses ; 

 as twilight deepens, however, they gradually disappear, but a few 

 moments after the last have gone, A. argyritarsis enters from the 

 shelters where it has been hidden during the day, the flight lasting 

 for about a quarter of an hour. 



The breeding-places of both species of Anopheles are evidently 

 intimately connected with collections of algae ; they invariably occur 

 together, and are particularly numerous in clear, slow-moving streams 

 with sandy margins, without vegetation and well exposed to the sun. 

 The many springs and small canals are particularly favoured, pro- 

 ducing abundant collections of algae that serve both as protection 

 and food for the larvae. Several typical breeding-places are described 

 and illustrated. It is noticeable that wherever the streams are shaded 

 by trees no larvae are found. The larvae hibernate in damp, muddy 

 or sandy places covered with algae. 



Wenyon (C. M.). The Action of "Bayer 205" on Trypanosoma 

 equiperdum in experimentally infected Mice. — Brit. Med. Jl., 

 London, no. 3175, 5th November 1921, p. 746. 



The drug " Bayer 205 " has been tested on a virulent strain of 

 Trypanosoma equiperdum in mice, a dose of 0-005 grm. per kilo- 

 gramme of body-weight causing the parasites to disappear. This 

 drug will probably prove more efficient than any hitherto used in cases 

 of sleeping sickness in man, trypanosomiasis of animals, and other 

 diseases such as kala-azar. The therapeutic dose for a man of 70 kgm. 

 should be 0-35 gm., and there is every reason to believe that this 

 and even larger doses can be tolerated. The exact dose will have to 

 be determined by direct trial, and experiments on these lines are now 

 in progress. 



Fraser (H.). Bovine Piroplasmosis. — Vet. Record, London, xxxiii, 

 no. 1742, n.s., i, no. 48, 26th November 1921, pp. 939-944. 



An account is given of bovine piroplasmosis as occurring in the 

 Tavistock district of Devonshire. The disease, caused by Piroplasma 



