37G 



ZOOLOGY. 



Fig. 3-J'.),— jVIetamorphosis of tlie Pnlexh^itans, or jigger, which lives in the toe of 

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

 ij, fecundated female ; 7, the same on the third day from its entrance under the ekin 

 of its human host ; 8, tlie Fame after several days' residence in the skin of its host ; 

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

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

 enlarged ; m, mandibles ; rf, maxillary palpi ; w, under-lip or labium.— After Karsteu 

 and Gluyon. 



