244 



MEDICAL ENTOMOLOGY 



Three palpal bands, the two last rather broad ; wing scales 



much narrower ............ 11 



11. Femora and tibiae white-spotted 12 



Femora and tibiae not white-spotted ruf ipes. 



12. Palpi white-spotted maculipalpis. 



Palpi not white-spotted pretoriensis. 



13. Abdomen with lateral tufts of very long slender scales on each 



segment (Chrlstya) implexus. 



Abdomen without lateral scale tufts . . . . . . . . 14 



14. Wing scales mostly yellow, the black patches on the veins 



much reduced, but three long and one short black marks on 



the costa and first vein, the first two almost or quite united . . . 15 

 Wings not so marked 16 



15. Last 2| joints of hind tarsi white theileri. 



Last joint of hind tarsi dark we I Iconic!. 



16. Wings with at least three pale spots on the costal border 



(doubtful species are included in the next division, 



\_Myzomyia} )............ 1 7 



Wings with at most two pale spots on the costal border .... 36 



17. Last hind tarsal joints white ; legs spotted .... natalensis. 



Last hind tarsal joints not white 18 



18. Femora and tibiae more or less spotted with white ; tarsi dis- 



tinctly ringed at the joints 19 



Femora and tibiae not at all white-spotted 20 



19. Hind metatarsi with about five well-marked narrow whitish 



rings ; female palpi with four narrow white rings . . ardensis. 

 Hind metatarsi without distinct rings ; female palpi with three 



white rings, the apical one broad costalis. 



20. Third vein with three dark and two light areas ; male palpi 



with the club mainly yellow, as in costalis . . . pallidopalpis. 

 Third vein with only two dark areas (near base and apex), or 



entirely dark ............ 2 1 



21. Palpi of female white only at the apex ; base of first fork-cell 



nearer apex of wing than that of second ; small, very dark 

 species . . nili. 



Palpi of female with three or four white rings 22 



22- Third vein mainly, (funestus, type form, and culicifacies) or 



entirely dark ; mesonotum clothed with hairs 23 



Third vein mainly pale ........... 26 



23. Hind tarsi with fairly distinct pale rings ; wing field with some 



pale spots longipalpis. 



Legs entirely^ dark 24 



24. Wing field entirely dark ; no pale scales even at bases of fork- 



cells rhodesiensis. 



Pale spots present at bases of fork-cells, even in the darkest 



specimens , : ............ 25 



25. Lighter species, Mediterranean and Oriental . . . . culicifacies. 

 Darker species (very variable) , Ethiopian .... funestus. 



26. Palpi of female black-tipped 27 



Palpi of female white-tipped (in A . cinereus the white scales 



at the tip are easily rubbed off) ; mesonotum with narrow, 



but fairly distinct scales . ... ... 30 



