PSOROPTIC MANGE — SHEEP SCAB. 



619 



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

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

 moultiug 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). AH greatly enlarged. 



