i87 



comprise over eighty different species. The assign- 

 ing of an Anopheles (old sense) to its proper 

 genus, simplifies, therefore, very much the ultimate 

 determination of the particular species. Theo- 

 bald's classification is the following : — 



Thorax with hair-like curved scales ; some 

 narrow curved ones in front ; abdomen with 

 apical lateral scale tufts and scaly venter, 

 no ventral tuft 



Avrihalsagia 



Thorax with hair-like curved scales ; abdominal 

 scales on venter only with a distinct ventral 



apical tuft, no lateral tufts 



-A{y sorhynchus 



