6 DIPTERA 



TABLE OF GENERA 



a) Thorax and abdomen with hair-like curved scales. 



a. No flat scales on head, but upright forked ones. 



i. Wing scales large, lanceolate Genus Anopheles, Meigen. 



2 . Wing scales mostly small, long and narrow or slighty 



lanceolate Genus Myzomyia, Blanchard. 



3. Wings with patches of large inflated scales .... Genus Cycloleppteron, Theobald. 

 (3. Median area of head with some flat scales; prothoracic lobes mam- 



millated. 



4. Wing scales lanceolate Genus Stethomyia, Theobald. 



b) Thorax with narrow curved scales; abdomen hairy. 



5. Wing scales small and lanceolate Genus Pyretophorus, Blanchard. 



c) Thorax with hair-like curved scales and some narrow curved ones in front; 



abdomen with apical lateral scale tufts and scaly venter ; no ventral 

 tuft. 



6. Wing scales lanceolate Genus Arribalzagia, Theobald. 



d) Thorax with hair-like curved scales; no lateral abdominal tufts ; distinct 



apical ventral tuft. Palpi densely scaly. 



7. Wing with dense large lanceolate scales Genus Myzorhynchus, Blanchard. 



e) Thorax with hair-like curved scales and some narrow curved lateral ones ; 



abdomen hairy with dense long hair-like lateral apical scaly tufts. 



8. Wing scales short, dense, lanceolate ; fork-cells short. . Genus Christya, Theobald. 



f) Thorax with very long hair-like curved scales ; abdomen with hairs except 



last two segments which are scaly. Dense scale tufts to hind femora. 



9. Wings with broadish, blunt lanceolate scales. . . . Genus Lophoscelomyia, Theobald. 



g) Thorax and abdomen with scales. 



10. Thoracic scales narrow-curved or spindle shaped ; 



abdominal scales as lateral tufts and small dorsal 



patches of flat scales Genus Nyssorhynchus, Blanchard. 



11. Abdomen nearly completely scaled with long irregular 



scales and with lateral scale tufts Genus Cellia, Theobald. 



12. Abdomen completely scaled with large flat scales as in 



Culex Genus Aldrichia, Theobald. 



I. Genus ANOPHELES, Meigen 



Anopheles, Meigen, Syst. Beschr. Eur. Zvveifl. Ins. Dipt. Vol. 1, p. 10, pi. 17, f . 5 & 6 (1818). 



Characters. — Thorax and abdomen clothed with hair-like curved scales, practically hairs. 

 Palpi in the 9 thin, not densely scaled, nearly as long as the proboscis ; in the q* clavate. Head with 

 numerous upright forked scales. Antennae plumose in rj' ; verticillate in the 9 • Wings with large lanceo- 

 late scales, which may or may not be united into denser groups forming spots. Mostly large species. 



Geographical distribution of species. — This genus occurs in Europe, Africa, Asia, 

 North America, West Indies and probably Australia. It is essentially a temperate region genus, those that 

 occur in other regions being mostly hill species. 



