tlG. 6 



Fig. 4 — An external parasite, a bird-louse (Lipeurus ferox). 



Fig. 5 — A tachina fly (Blepharipeza adusta) the larva of whL:h 

 is an internal parasite. 



Fig. 6 — Work of an internal parasite, puss-moth larva parasi- 

 tized by a small ichneumon fly. 



