630 



THE MICROSCOPE. 



the Flea (fig. 287) is a horny case, divided into distinct 

 segments ; those upon the thorax being always disunited. 

 Although apterous, the Flea has the rudiments of four 



Fig. 287 



1, Female Flea. 2 Male Flea. (The small circles enclose fleas the aclaal or 

 life size./ 



