Illustrated Studies 



FIG. 171. 



A 



FIG. 173. Metamorphosis of flea. 



**-- o 



FlG. 172. Metamor- 

 phosis of house fly 

 (enlarged). 



FIG. 174. Louse and 

 its eggs attached to a 

 hair. Natural size 

 and magnified. 



^^^;.j'Vv/!4 : t 



Si "S; \.'\- ,"X 'JKV '-. -''!/ uJ*' v.:1-iir3iEM3^fcr 



^^^*lP'r" ; ^s^%^ s'feQ^|; : Sp^^^B 



FIG. 175. Bed bug. x 5. 



H^r-"^ ''^'^B^fc^SSS't^-SJIs&^j^BJfflE^^ ^-a^-- 

 FlG. 176. Life history of mosquito. 



