191 



characteristic swelling agrees with that of Triatoma spp., especially 

 T. niegista, which is more abundant in the interior, particularly in 

 rural districts. The decrease of the disease accompanies that of 

 T. megista, and in a certain zone the symptoms are practically 

 non-existent in persons that have never left the district. 



CHAC4AS (C). Tripanosomiase americana. Forma aguda da Molestia. 



[American Trypanosomiasis : The Acute Form of the Disease.] — 

 Mem. Inst. OsivaldoCruz, Rio de Janeiro, vm., no. 2, 1916, pp. 37- 

 60, 5 plates. [Eeceived 18th October 1917.] 



In this paper 29 cases of acute American trypanosomiasis are 

 described, most of them being children in their first year. Triatoma 

 was nearly always observed in the dwellings where these cases occurred. 



Reports of Bureau Meetings. Fly-BIown Sheep. — Jl. Dept. Agric. 

 S. Australia, Adelaide, xx, no. 12, July 1917, p. 998. [Received 

 16th October 1917.] 



It has been noticed in South Australia that in recent years the 

 blowing of sheep by flies has become very much worse. While formerly 

 only wounds on sheep were attacked, healthy animals with unsoiled 

 wool are now infested on any part of the body. No treatment is known 

 that gives more than temporary immunity from the flies. The most 

 thorough dipping ensures protection only for a few weeks, and the 

 same may be said of crutching. It is admitted that the only means 

 of combating the trouble is constant attention to the sheep and 

 immediate treatment of the animals blown and of those likely to be 

 blown, at times when flies are particularly bad. The treatment 

 recommended is to subject those parts of the animal attacked, or 

 likely to be attacked, to a very strong jet of powder sheep dip, well 

 stirred up and applied by an engine or other power adequate to carry 

 the powder right through the wool into the skin. This method has 

 several advantages over dipping : a large number of sheep can be 

 treated in a very short time, the necessary plant can easily be carried 

 from place to place and the sheep treated in the paddock or yard 

 without the necessity for driving them to a dip, while the treatment 

 can be given in almost any weather without risk. 



Matthews (A.). External Parasites of Sheep. Eradication of Ticks 

 in New Zealand. — Jl. Agric, Wellington, N.Z., xv, no. 2, August 

 1917, pp. 73-78. [Received 23rd October 1917.] 



Melophagus ovinus (sheep tick) is not considered by the author a 

 difl&cult parasite to destroy, as this Hippoboscid fly is unable to live 

 away from the sheep for more than four to six days, even under 

 favourable conditions. As the young are brought forth as pupae, 

 which are attached to the wool-fibres and develop in about 21 days, 

 it may be necessary to give a second dipping in order to exterminate 

 these. The time strongly advocated for dipping is shortly after 

 shearing, the author's experience being that sheep dipped only once 

 in the year at that time remain absolutely free from either these flies 

 or from lice. There are then but few living individuals to deal with, 

 as the pupae cannot well adhere to the short wool of machine-shorn 



