ACATUNA. 



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Fig. 290. — Parasites. Acarina. 



1, IjOUSO, Human ; magnified 50 diameters. 2, Acarus domesticus, Cheese- 

 Mite ; under surface. 3, A cams Scabiei, Itch-Insect ; magnified 350 dia- 

 meters. 4, Entozoon folliculorum, Grub from the human skin in various 

 stages of existence, from the egg upwards : magnified 350 diameters. (The 

 small circles near represent the objects about the natural size.) 



