558 



THE ANIMAL PARASITES OF MAN 



also vary, but not to the same extent; the chief differences to be noticed are 

 in the form of the two respiratory trumpets. 



The eggs, which may be laid separately (Anopheles mactihpennis, Stegomyia 



Proboscis 



Anlennae 



Palpi 



Eyes''' 

 Occiput"' 



Prothoracic 



lobes 

 Mesothorax-"' 



Scutellurn 



Metathora*"" 



orMetanoluno 



First abdomin'al 

 segment 



Abdomen 



cf <f 



Basal 

 lobes of O 



Basal 



lobes 



Clasper. 



Proboscis 

 Palp 



Antennae 



Basal lobes ofantennae 



Frons 



Vertex 



Eyes 



Occiput 



Nape 



FIG. 396. --Diagram showing the structure of a typical mosquito. (Theobald.) 



fasciata, Joblotia mvipes, etc.), or in rafts (Culex pipiens, C.fatigans) or in chains 

 (Pseudotceniorhynchus fasciolatus], present a great variety of forms. The most 

 peculiar are shown in fig. 395 (Taeniorhynchus, Culex, Stegomyia, Anopheles, 

 Psorophora). 



