1134 EXPERIMENT STATION RECORD. 



infestation has occurred in the brain and also in the spinal cord. The pathological 

 lesions are also described. 



No treatment of gid is successful. In preventing the distribution of the worms it 

 is desirable to kill all useless dogs and also wolves and foxes. Dogs which are kept 

 for herding purposes or other use about the farm should be treated at intervals for 

 the adult form of the tape worm. In this way the general distribution of the worm 

 should be prevented. 



A sheep parasite, W. W. Froggatt (Agr. Gaz. New South Wales, 15 (1904), No. 10, 

 p. 977). — Considerable loss was experienced in sheep and wool in parts of New South 

 Wales on account of the attack of the sheep maggot belonging to the genus Cali- 

 phora. Carbolic washes of various sorts have been tried and abandoned, since they 

 have no lastirg effect. Sulphur and oil is an effective remedy, and arsenic may be 

 added to this mixture in cases where there are no wounds on the skin. 



The sheep nostril fly (Bd. Agr. and Fisheries [London], Leaflet 118, pp. 4, figs. 2) . — 

 The habits and life history of CEstrus ovis are described and notes are given on the 

 symptoms of infestation of sheep with these insects and on the most successful meth- 

 ods of treatment for ridding sheep of them. The fly may be prevented from laying 

 its eggs in the nostrils of sheep by repeated treatment with tar, fish oil, or similar 

 substances. Sheep should be removed from pastures which are known to be infested 

 before the season for the appearance of the adult flies. 



Sulphur internally as a preventive against the attacks of ticks, W. Rob- 

 ertson {Agr. Jour. Cape Good Hope, 25 (1904), No. 5, pp. 588-590, figs. 3). — It has 

 been sometimes supposed that the internal use of sulphur was effective in preventing 

 the infestation of cattle with ticks. The author, therefore, tested this matter in a 

 thorough manner. 



Two young steers and a colt were given sulphur in their food for a period of about 

 40 days, during which they received about \\ oz. of sulphur daily. At the end of 

 this period the daily dose was increased to about 3 oz. The steers were then infested 

 with RMpicephalus decoloratus. These ticks reached maturity in the usual time, and 

 it was thus shown that the prolonged sulphur treatment did not produce the slight- 

 est effects upon the ticks. 



Similar results were obtained after infestation of the colt. Animals were fed with 

 doses of aloes and wild garlic, but neither of these acted as preventives or caused 

 the ticks to fall off from infested animals. 



Trypanosome diseases, R. Koch (Dent. Med. Wchnschr., .10 (1904), No. 47, pp. 

 1705-1711, figs. 5). — The biology and life history of trypanosomes are briefly dis- 

 cussed with especial reference to their pathogenic effects in the production of various 

 diseases of animals and man. Among these diseases special mention is made of 

 surra, mal de caderas, tsetse-fly disease, the trypanosomiasis of rats, and similar dis- 

 eases in man. These diseases are classified by the author under 2 groups, in the 

 first of which the trypanosomiasis of rats and the trypanosome disease of cattle as 

 described by Theiler are placed. 



Trypanosomiasis in the Anglo-Egyptian Soudan, A. Balfour (British Med. 

 Jour., 1904, No. 2291, pp. 1455, 1456).— Attention is called to the discovery of the 

 trypanosomes in the blood of cattle which came from Kodok. In one animal which 

 died of the disease and in the blood of which the trypanosomes were found a pig- 

 mented ulceration of the membrane of the stomach was observed. Large numbers 

 of ticks were found on this animal and were believed to belong to Amblyomma 

 variegatum. In the northern Soudan, trypanosomiasis has thus far not been shown 

 to prevail. The author examined the blood of bats, small birds, and mammals with 

 negative results. 



Note on the role of the horsefly in the transmission of trypanosoma infec- 

 tion, L. Rogers (Britisli Med. Jour., 1904, No. 2291, pp. 1454, 1455).— -The author 

 calls attention to the fact that in 1899 he carried out a series of experiments in Muk- 



