PSOROPTIC MANGE — SHEEP SCAB. 



619 



Fig. 255. — Left top figure", egg of mite which causes common sheep scab; middle top 

 figxu-e, six-legged stage of sheep scab mite ; right top figure, young female before 

 moulting for the last time, dorsal view ; middle figure, adult male parasite of 

 sarcoptic scabies of man (the corresponding parasite of sheep is very similar), 

 ventral view, X 250 (after Blanchard) ; left bottom figure, adult female parasite 

 of sarcoptic scabies, dorsal view, X 250 (after Blanchard) ; right bottom figure, 

 same, ventral view (after Blanchard). All greatly enlarged. 



