376 



ZOOLOGY. 



Fig. .349. Metamorphosis of SarcottsyUa penelrans, or jigger, which lives in the toe 

 of the natives of tropical America. 1, egg ; 2, embryo ; 3, larva ; 4, cocoon ; 5, pupa : 

 6, fecundated female ; 7, the same on the third day from its entrance under the skin 

 of ifg human host ; 8, the same after several days' residence in the skin of its host ; 

 9, fully grown female magnified four times ; 10, head of the same still more enlarged ; 

 11, the female before it has entered the skin of its host ; 12, the mouth-parts, much 

 enlarged : m, mandible? ; d, maxillary palpi ; w, under-lip or labium. After Karsteu 

 and Guy on. 



