176 



sub-families, based mainly upon the length of the 

 palpi in male and female : — 



1. Palpi long in both sexes, as long as the 

 proboscis in the female AnopheUna 



2. Palpi long in both sexes, shorter than the 

 proboscis in the female Megarhinina 



3. Palpi short in female, long in male — 



Culicina 



4. Palpi short in female, long in male. Post- 

 scutellum with hairs (chaetae) and scales, Joblotina 



[— Trichoprosopma 



5. Seven (not six) longitudinal veins with 

 scales Heptaphlebomyina 



6. Palpi very short in female and male — 



Aedeomyina 



7. Proboscis short, not formed for pierc- 

 ing Corethrtna 



Sub-Family Anophelina (vide next Chapter) 



Sub-Family Megarhinina 



Genus i. Megarhinus. — First sub-marginal 

 cell much smaller than second posterior cell. Palpi 



Fig. 48. Head and Scutellar Scales'of Aedes (left) 

 Megarhinus (right) 



