26 



The Irish Naturalist. 



March, 



entire maggot ; in fact the mouth parts in the first stage 

 are not only relatively but also actually larger than in any 



Fig. I. 



Fig. 2. 



Fig. 3. 



Fig. I. — Hypoderma bovis, second-stage larva, mouth armature, side 

 view, X 240. 



Fig. 2. — H. bovis, second-stage larva, mouth armature, dorsal view, 

 X 240. 



Fig. 3. — H. lineatum, second-stage larva, mouth armature, dorsal view, 

 X 240. 



h. mouth hooks ; ph. s. pharyngeal sclerite ; p.s. parastomal sclerites. 



other stage. Laake has pointed out, in the paper above re- 

 ferred to, that in the first stage larvae the most conspicuous 

 distinguishing feature between the two species is to be 

 found in the shape of the mouth-hooks. " The forked 



