I 



272 On new Species of West-African Culicid? 



scales. Abdomen covered with black scales, showing a violet 

 iridescence ; sixth and seventh segments with silvery-whiie 

 apical spots ; eighth segment with a basal silvery-white 

 patcli ; all segments have lateral, nearly circular, basal silvery- 

 white spots ; border-bristles black. Venter black, with 

 broad basal silvery-white bands. Legs. Front pair : femora 

 and tibia? bristly, black, with a few basal pale scales on first 

 tarsal segment and a line of silvery scales upon the under surface 

 of the femora. Mid pair : femora and tibiae bristly, black ; 

 femora with a median silvery-white patch on the anterior 

 surface ; first tarsal with basal white band ; second tarsal with 

 basal two-thirds white, the remainder black ; the other seg- 

 ments black. Hind pair : femora and tibise bristly, black ; 

 femora with median silvery-white patcli ; tibise with narrow 

 basal white band, much broader beneath; first tarsal with 

 very small basal white spot ; second tarsal mostly white, the 

 other segments black. Ungues equal and uniserrate. Wings 

 covered with brown scales, the wing-membrane with a brown 

 stain between costa and second longitudinal vein ; first sub- 

 marginal cell longer and narrower than second posterior cell, 

 its stem ^ the length of the cell; stem of second poste- 

 rior considerably more than ^ length of cell ; posterior cross- 

 vein distant its own length from the mid cross-vein. Ualteres : 

 stem ochreous ; knob dark, with silvery-while apex. 

 Length 5'5 mm. 



<J . — Resembles the female. Palpi slightly shorter than 

 proboscis, black-scaled. Legs : the white spots on front pair 

 rather more distinct than in the female. Wings; first sub- 

 marginal longer and narrower than second posterior ; stem of 

 first submarginal considerably more than ^ length of cell ; 

 stem of second posterior as long as cell ; posterior cross-vein 

 distant more than its own length from mid cross-vein. Un- 

 gues on fore and mid legs unequal and uniserrate } on hind 

 legs equal and uniserrate. 



Length 4 mm. 



The following African species of Stegomi/ia are charac- 

 terized by having large oval silvery-white flat scales, with 

 the peculiar contour of overlapping circles upon the thorax 

 and a few narrow curved scales upon the nape : — ■ 



J. St. africana, Theobald. 



2. St. ujncoargentea, Theobald. 



3. St. luteocephala, Newstead. 



4. St. pollinctoTj Graham. 



