Mites Injurious to Domestic Animals. 



43 



About two pints of this oily mixture will be sufficient to dress an 

 ordinary case. 



In war time dipping in specially constructed tanks is used 

 against sarcoptic mange in horses, and is said to be much the best 

 method of combating the complaint. Descazeaux gives a plan of 

 a piscina or tank for bathing horses in Rec. Med. Vet. D'Alfort, 

 xciv., no. 12, June 30th, 1918, p. 273. 



Fig. 25. 



(a) Posterior abdominal lobes of male of Pterolichi/s bicaudatus (p. 64) 

 a feather mite from ostrich. (b) Posterior abdominal lobes ot 

 Pterolichus sculpturatus (p. 64), from ostrich. (Original.) 



Sarcoptic mange of the horse is transmissible to man. 



Psoroptic mange in the horse chiefly afiects the regions of the 

 body situated near the long hair, such as the neck, withers, rump, 

 base of tail, etc., but in advanced cases other parts of the body 

 may be invaded. There is an accumulation of thick humid crusts 

 under which the mites live and multiply. 



According to Railliet and Henry (Bull. Soc. Cent. Med. Vet. 

 Ixxiii., 1920, p. 41) the Psoroptes found in the ears of horses, mules 

 and asses is 'distinct from that occurring on the body of these hosts. 



