ATTACKING THE LEAVES. 



79 



of this parasite is a fot, fleshy, footless grub, of a translucent 

 yellow color, and about half an inch in length. A third para- 

 site is a small four- winged fly, known as the Cecropia Chalcis- 

 fly, Smicra marise (Riley) (Fig. 75). In the figure the fly is 



Fui. 75. 



FiQ 7G. 



much magnified ; the short lines at the side show its natural 

 size. A fourth friendly helper is an Ichneumon fly, known 

 under the name of the 

 Cecropia Cryptus, Cryptus 

 extrematis Cresson, which 

 infests the Cecropia larva 

 in great numbers, filling its 

 chrysalis so entirely with 

 its thin, papery cocoons 

 that a transverse section 

 bears a strong resemblance 

 to a ])iece of honey-comb. 

 (See Fig. 76.) The flies of 

 this parasite escape in June, 

 the female presenting the 

 appearance shown in Fig. 

 77, where it is much mag- 

 nified, the short line at the side showing its natural size. 

 Another two-winged parasite is Gaurax anchora Loew. 



While very partial to the apple, the larva of Cecropia will 

 also feed on the cherry, plum, pear, maple, willow, lilac, Eng- 



