12 



of the human inmates. Suggestions are given for the most practicable 

 methods of preventing damage by these pests, with a list of the 

 literature that may be consulted for further information concerning 

 them. 



Eradication of Sheep Scab. — Vet. Record, London, xxxiii, no. 1740, 

 n.s., i, no. 46, 12th November 1921, pp. 905-907. 



The information in this paper is taken from an address by W. J.Young. 



Sheep scab is due to the presence in the skin of the mite, Psoroptes 

 communis ovis. The known facts as to the life-history are quoted. 

 The existing legislation in Great Britain is briefly noticed, as well as 

 various necessary precautions in mixing and applying the dips 

 recommended by the Ministry of Agriculture. Infection should be 

 prevented by careful inspection of railway trucks in which sheep are 

 to travel, and the dipping, twice within fourteen days, of all sheep 

 brought from market. Sheep should be isolated during this period. 

 Soft water should be used for dips, sea water and brackish or peaty 

 waters being highly objectionable. 



Noc (F.) & NoGUE (M.). Icteres epidemiques et Spirochetes au Senegal. 



[Epidemic Jaundice and Spirochaetes in Senegal.] — Bull. Soc. 

 Path. Exot., Paris, xiv, no. 8, 12th October 1921, pp. 460-470. 

 Details are given of three outbreaks of epidemic jaundice that 

 occurred among the troops in camp in Senegal between 1916 and 1921. 

 While studying the problem of whether the disease is indigenous, 

 spirochaetes closely resembling those of relapsing fever and pathogenic 

 to monkeys were found in the shrewmouse and in Mus decunianus. 

 In the course of a somewhat hurried survey, Ornithodoriis was not 

 discovered ; in fact ticks of this genus have not as yet been observed in 

 French West Africa. The cases under discussion, however, harboured a 

 number of lice, and in one of these parasites a spirochaete was found. 

 Inoculation of a young Cynocephalns monkey by crushing lice on the 

 freshly shaved skin gave, however, a negative result. It is still doubt- 

 ful, therefore, whether the disease has been introduced from a foreign 

 source by means of lice, by the troops coming in from Morocco or the 

 southern colonies, or whether it arises from an indigenous organism 

 resembling that of tick fever. 



.RouBAUD (E.) & Descazeaux (J.). Contribution a I'Histoire de la 



Mouche domestique comme Agent vecteur des Habronemoses 



d'Equid^s. Cycle evolutif et Parasitisme de VHabronema megas- 



toma (Rudolphi 1819) chez la Mouche. — Bull. Soc. Path. Exot., 



Paris, xiv, no. 8, 12th October 1921. 471-506, 1 plate, 9 figs. 



In the authors' conclusions to this paper, the close analogy is explained 



between the development of Habronema niegastoma in the house-fly 



[Musca domestica] and that of the filariae of the dog, Dirofilaria 



immitis and D. repens, in the mosquito. 



In the horse, infestation with H. niegastoma is produced by flies 

 alighting on wounds (cutaneous habronemiasis), on the nostrils (pul- 

 monary habronemiasis), or on the lips (habronemiasis of the stomach). 

 Gastric infestation through the ingestion of parasitised flies, if it is 

 possible, would seem to be merely accidental, and the whole process of 

 development suggests a spontaneous liberation of the active larvae 

 at the entrance to the digestive tract. Cutaneous or pulmonary lesions 

 are caused by stray larvae, the development of which has no relation 



