418 



THE ANIMAL PARASITES OF MAN 



Bancroft has found them in salt water of specific gravity 10,40 (Afucidus 

 alternans, Culex anniilirostris and C. marinus, &c.). The food of the 

 larvae is very varied; the majority appear to feed upon confervse, small 



Proboscis 



Antennae 



Palpr 



Eyes""" 

 Occiput 



Protboracic" 



lobes 

 Mesotborax-- 



Scutellum 

 Metathorax""" 



First abdornfnal 

 segment 



Abdomen 



Basa' 

 lobes of O 



Basal 



lobes - 7 4 



C'asper. .. 



Proboscis 



Pcipi 



Antennae 



Basal lobes ofantennae 



Fro no 



Vertex 



Eyes 



Occiput 

 Nape 

 FIG. 274. Diagram showing the structure of a typical mosquito (Theobald). 



Crustacea and insects ; some are cannibals, readily devouring others of their 

 own kind. The larger larvae of Megarhinus, Psorophora, Toxorhynchites and 

 Mucidus are extremelv ravenous and devour one another. 



