ACARINA. 



635 



Fig. 290. parasites. Acarino.. 



1, LonfiO, Human ; magnified 50 diameters. 2, Acarus domestic/us, Choese- 

 Mite ; tinder surface. 3, Acarus 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. ) 



