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Chapter XIII 



ANOPHELINAE. EXTERNAL ANATOMY OF THE 

 IMAGO 



The Head. Is composed mainly of the two large 

 compound eyes. These meet below and approach one 

 another very closely above. 



The following are the usual names for the different 

 regions of the head (Fig. 50) 



1. The nape : the extreme back of the head. 



2. The occiput : the portion behind the eyes. 



3. The vertex : the space between the eyes. 



4. The frons : the space in front of the eyes. 



5. The gena : the side of the head below the 



eyes. 



, The frons is triangular in shape, with one angle 

 directed downwards. From the upper two angles 

 arise the antennae, and from the lower projects the 

 clypeus, lying over the base of the proboscis. 



The Clypeus. Projects over the base of the pro- 

 boscis as a prolongation of the frons. The character 

 of the clypeus is of generic importance, e.g., 



1. Hairy in Culex ; 



2. Scaly in Stegomyia ; 



3. Nude in Joblotia. 



The Antennae. Consists of fourteen to sixteen 



