﻿244 F. W. EDWARDS — A KEY FOR DETERMINING THE 



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



cells ... ... ... ... ... ... ... 22. rliodesiensis. 



Pale spots present at bases of fork-cells, even in the darkest specimens 25. 



25. Lighter species, Mediterranean and Oriental ... 23. culicifacies. 

 Darker species (very variable), Ethiopian ... ... ... 24. 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. 



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



25. impunctus. 

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



28. Vestiture of mesonotum consists of hairs ... ... ...26. hispaniola, 



Vestiture of mesonotnm consists of narrow scales ... ... ... 29. 



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



scaled ... ... ... ... ... ... ... 27. chaudoyei. 



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

 scaled ... ... ... ... ... ... ...28. multicolor. 



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



species, wing-length about 5 mm. ... ... ... ... 29. 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 wine-lenffth 3*8 mm. ... ... ... 30. traiisvaalensis. 



Average wing-length 3 mm ... ... ... ... 24. funestus. 



33. Larger (about 5 mm.) : Mediterranean ... ... 31. superpictus. 



Smaller ; Ethiopian ; middle and terminal pale rings on female 



palpi about equal and rather broad : tarsal joints with narrow 

 yellowish rino-s ... .. c ... ... ... ... ... 34. 



34. Larger, darker species (3'5-4*5 mm.) ; third and fourth costal spots 



larger ... ... ... ... ... ... ... 32. mar shrill. 



Smaller, lighter species (3-3*2 mm.) : third and fourth costal spots 

 smaller ... ... ... ... ... ... ... ... 35. 



35. A dark spot at apex of wing... ... ... ... ...33. pitchfordi. 



No dark spot at apex of wing ... ... ... ... 34. flaricoata. 



36. Thorax clothed with narrow scales ; light spots on wings more 



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



Thorax clothed with hairs (excluding the scales near the front 

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



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



broad — as in A. marshalli ; tarsal joints with rather broad white 

 apical rings ... ... ... ... ... ... ... 35. austeni. 



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 ... ... ... ... ... ... 36. distinetus. 



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

 whitish, tarsi distinctly ringed at the joints 18, costalis var. melas, 



