MOSQUITOS OF THE PALAEARCTIC REGION. v^29 



2. Abdominal tergites with continuous lateral pale stripes . . modestus, Fie. 

 Abdominal tergites, with basal lateral pale patches. . . . pusillus, Mcq. 



3. A row of small flat white scales round the margin of the eyes [Culicomyia) 



impudicits, Fie. 

 Scales on the top of the head all narrow {Culex) . . . . . . . . 4 



4. Prothoracic lobes and pro-epimera with numerous broad flat scales ; pale 



bands of abdominal tergites apical (occasionally reduced to lateral spots) 5 

 Prothoracic lobes and pro-epimera with few or no flat scales . . . . 6 



5. Hind tibia with a distinct white spot on the outer side at the tip, hortensis, Fie. 

 No such spot . . . . . . . . apicalis, Adams. 



6. Dorsum of abdomen uniformly dark brown ; species without ornamentation 



hayashi, Yam. 

 Abdominal tergites at least with basal lateral patches of pale scales . . 7 



7. Proboscis and tarsi pale-ringed. . .. .. .. .. .. .. 8 



Proboscis and tarsi without pale rings . . . . . . . . . . 14 



8. Anterior two-thirds, or at least the middle third, of the mesonotum 



with whitish scales, which contrast sharply with the dark scales of the 

 posterior third . . . . . . . . . . . . . . . . 9 



Thorax not so marked . . . . . . . . . . . . . . ..11 



9. Femora and tibiae with numerous small but conspicuous pale dots ; 



abdominal tergites with basal pale bands or spots only quasigelidns, Theo. 

 Femora and tibiae with the scales mottled, but without conspicuous pale 

 dots ; abdominal tergites with apical pale bands . . . . . . . . 10 



10. Wings with numerous pale scales . . . . . . bitaeniorhynchus, Giles. 



Wing-scales all dark sinensis, Theo. 



11. Wings with conspicuous pale markings .. .. .. .. ..12 



Wings unmarked . . . . . . . . . . . . . . . . 13 



12. Tip of vein Cuo (lower branch of fifth) dark-scaled . . . . mimeticus, Noe. 

 Tip of vein Cuo pale-scaled orientalis, sp. n. 



13. Mesonotal scales ah dark reddish-brown, except perhaps round the margin ; 



middle tibiae without any trace of a pale stripe . . tritaeniorhynchns. Giles. 

 Mesonotal scales mixed light and dark brown ; middle tibiae with a pale 

 anterior longitudinal stripe more or less indicated . . vishniii, Theo. 



14. Femora and tibiae with chstinct pale longitudinal stripes anteriorly 



(most marked on front and middle legs).. .. .. .. ..15 



Femora and tibia not striped . . . . . . . . . . • • . . 16 



15. Mesonotal scales dark brown, more or less mixed with lighter; pale 



abdominal bands generally triangularly produced in the middle 



tipiiliformis, Theo. 

 Mesonotal scales reddish-brown ; pale abdominal bands gently rounded 



virgatipes, Edw. 



16. Abdominal tergites with complete basal pale bands .. .. •• 17 

 Abdominal tergites with basal pale lateral spots only . . . . . . 20 



17. Abdominal bands white . . . . . . . . . . • • . . 18 



Abdominal bands pale ochreous . . . . . . . • • • . . 19 



18. Pale abdominal bands very broad ; hind tibiae dark except at tip 



laticinctus, Edw. 

 Pale abdominal bands narrow ; hind tibiae with a more or less distinct 

 pale lateral stripe perexiguus, Theo 



