cso 



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 



W J 



Fig. 2S7 



I, Ft-male Flea. 2 Male Flea. fTbe small circles enclose fleas the actual or 



life size.; 



