DISEASES OF THE SKIN 47 



destroy any lice that have hatched out from 

 overlooked nits. All litter should be burned 

 and the hutches disinfected. 



Acarina, Mites 



Among the minor acarids that infest the rab- 

 bit are the Listrophorous gibbus, the Gama- 

 sus pteroptoides, and the Leptus autumnalis or 

 harvest bug. This latter, formerly considered 

 to be a distinct variety* is in reality the hexapod 

 larva of the Tetranychus autumnalis. Neither 

 of these parasites are of very much importance 

 unless present in great numbers, when they 

 produce irritation, loss of fur and self-inflicted 

 injuries from rubbing and scratching. They 

 are easily got rid of by the use of insect powder 

 or infusion of stavesacre,' or the calcium sulphid 

 mange lotion. 



Psora or Mange 



Mange in the rabbit is of serious import and 

 causes considerable' losses unless diagriosed 

 early and energetic steps taken for its treat- 

 ment and control. Four varieties of mange 

 parasites are found affecting rabbits. (1) Sar- 

 coptes scabei cuniculi, (2) Notoedres minor 

 cuniculi, (3) Psoroptes communis cuniculi, (4) 

 Symbiotes cimiculi. The first and second 

 named are burrowing parasites and produce re- 

 sp'ectively sarcoptic and notoedric mange. As 

 the symptoms of the two varieties are identical, 

 they will be described together. 



