238 



Taylor (F. H.). Studies in Australian Tabanidae. — Separate, dated 

 31st May 1918. from Records Australian Museum, Sydney, xii, 

 no. 5, pp. 53-70. [Received 21st October 1918.] 



This paper records the results of an examination of the Tabanidae 

 of the Austrahan Museum. The new species described include 

 Pelecorhynchus distinctus, P. tillyardi, Erephopsis neotricolor, E. mcina, 

 E. vicina var. georgii, Diatomineura cydister, D. regis-georgii, 

 D. hicolorata, Silvius minor, Ectenopsis vid'pecula, Wied., var. 

 nigripennis, Tahanus musgravii, T. rainhowi, T. pseudobasalis and 

 T. indefimlus. 



Mendy (J. B.). Gastrophilus duodenalis, Parasites del Est6mago del 

 Caballo. [Gastrophilus duodenalis, Parasites of the Stomach of the 

 Horse.] — Anales Soc. Rural Argentina, Buenos Aires, lii, no. 7, 

 July 1918, pp. 429-440, 16 figs. [Received 21st October 1918.] 



The method of attack of Gastrophilus duodenalis on horses, the 

 life-history of' the pest within the body of its host and the damage 

 it causes are discussed. From a few estabhshments in the south of 

 the province of Buenos Aires G. duodenalis has spread with alarming 

 rapidity during the last ten years until it has become a serious 

 problem in many of the South American States. It does not yet 

 occur to any extent in Uruguay, and the author advocates as the best 

 prophylaxis against its spread constant spraying during the embryonic 

 stage of the parasite and frequent baths during the summer 

 for all horses infested with eggs. The use of commercial specifics 

 against this pest is deprecated on the ground that they are frequently 

 not only ineffective, but even may have some irritating if not 

 dangerous effect on the horse. The treatment recommended consists 

 of the administration by ingestion of carbon bisulphide, which should 

 be given after a five-hours' fast in the form of 3 or 4 capsules of 10 

 grammes each at intervals of one hour. Immediately afterwards 

 a purgative of sodium sulphate in the proportion of 1 lb. to i gal. 

 tepid water should be given. As it is known that the larvae have the 

 habit of closing their posterior respiratory apertures agamst the action 

 of a toxic gas or liquid, the author suggests that a capsule of 10 grammes 

 of sulphuric ether or of chloroform should be administered before 

 the carbon bisulphide, so that the parasite may be anaesthetised with 

 the stigmata open, thus permitting the penetration of the poison into 

 the respiratory system. 



Lahille (F.). Atlas de la Garrapata transmisora de la Tristeza. 



[Review of the Tick transmitting Tick Fever.] — Bol. Ministerio 

 Agricultura de la Nacion, Buenos Aires, xxii, no. 2. July-December 

 1917, pp. 243-257, 7 plates, 4 figs. [Received 18th October 1918.] 



In view of the fact that a commission has been appointed under the 

 auspices of the Ministry of Agriculture, to undertake a campaign 

 for the suppression of the tick [Margaropus (Boophilus) annulatus 

 microplus] the transmitter of tick fever to cattle, the author has written 

 this condensed account of its hfe- history and habits. The biology 

 of the tick is graphically represented in a chart showing the various 

 stages in the life-cycle. Attention is again drawn to the necessity 

 for one or two experts to devote themselves entirely to the problems 

 in the biolog)'- of the tick that have not yet been solved. 



