AFRICAN SPECIES OF ANOPHELES 



245 



27. No dark scales on first fork-cell or on anterior branch of 



second ..-..-... . . . . . impunctus. 



Dark spots present (though sometimes small) on first fork-cell ... 28 



28. Vestiture of mesonotum consists of hairs ..... hispaniola. 

 Vestiture of mesonotum consists of narrow scales ...... 29 



29. Third and fourth costal spots smaller ; first fork-cell mainly 



pale-scaled chnudoyei. 



Third and fourth costal spots larger ; first fork-cell mainly 

 dark-scaled multicolor. 



30. Last joint of female palpi mainly dark, pale at each end ; 



large species, wing length about 5 mm. .... cinereus. 

 Last joint of female palpi mainly or entirely white . . . . . 31 



31. Tarsi dark ; middle ring on female palpi rather narrow ..... 32 

 Tarsi with pale articulations .......... 33 



32- Average wing length 3.8 mm transvaalensLs. 



Average wing length 3 mm. . ...... funestus. 



33. Larger (about 5 mm.) ; Mediterranean super pict us. 



Smaller ; Ethiopian ; middle and terminal pale rings on 



female palpi about equal and rather broad ; tarsal joints 



with narrow yellowish rings . . . . . . . . .34 



34. Larger, darker species (3.5 to 4.5 mm) ; third and fourth costal 



spots larger marshal li. 



Smaller, lighter species (3 to 3.2 mm) ; third and fourth costal 



spots smaller ............ 35 



35. A dark spot at apex of wing pitchfordi. 



No dark spot at apex of wing f lavicost a. 



36- Thorax clothed with narrow scales ; light spots on wing more 



numerous ............. 37 



Thorax clothed with hairs (excluding the scales near the front 



margin) ; wings very dark, or else quite unicolourous .... 39 



37. The two last palpal bands (in female) about equal and rather 



broad as in tnarshalli ; tarsal joints with rather broad 



white apical rings ........ austcni. 



Palpi of female with four narrow whitish rings ; the terminal 



joint having a dark ring in the middle ....... 38 



38. Numerous yellow-forked scales on the head ; legs dark, tarsi 



scarcely ringed ......... 



No yellow-forked scales on head ; femora and tibiae spotted 

 with whitish, tarsi distinctly ringed at the joints . 



39. Last 2 to 3 joints of hind tarsi white ; female with a tuft of 



scales on the ventral side of the last abdominal segment 

 (Myzorhynchus) ......... 



Last joints of hind tarsi not white ; female without ventral 



scale-tuft 40 



40. Blackish species ; wings with some pale spots . . . . . . .41 



Lighter species ; wings without any pale spots ...... 42 



41. Female palpi shaggily scaled; pale scales of wings occurring 



mainly on the fourth, fifth and sixth veins .... umbrosus. 

 Female palpi with appressed scales ; pale scales of wings less 



numerous and occurring mainly on the first vein . . . smithii. 



42. Wings with dark spots formed by accumulation of scales. . maculipennis. 



distinctus. 



costalis var. 

 melas. 



muritianus. 



