ALDER CATERPILLARS. 
627 
hi 
\ \^^^y -" " 
Fig. 205.— Larva of Apatela parasitized by Aleiodes : a, dorsal view; b, lateral, showing holes made 
by the exit of parasites; c, the cocoons within the host.— Smith del. 
"Full-grown larva. — Head and body black, head large and full, a little wider than 
the body. Body with pale yellow radiating hairs along the sides low down, but 
Fig. 206.— Rhogas Icetus Cress, from Apatela hastulifera on alder. After Riley. 
above covered densely with umber-brown hairs, forming a slight dorsal crest. The 
scattered hairs in front and at the end of the body pale yellowish and of unequal 
