PUPAL STAGES OF WEST AFRICAN CULICID.E. 29 



The siphon is very dark, short and stout, about twice as long as the base ; 

 the spines are strong, serrated, and run up in a curved Kne from the base to 

 nearly the middle ; there is a double hair (simple) beyond the spines; the 

 valves are small (PL V, figs. 9 & 10). 



The anal segment is short with stout subequal papillae, light yellow in colour ; 

 one specimen has one pair almost hyaline, though the other pair is o£ a 

 vellow colour ; the papillae are longer than the segment ; there are long hairs 

 on the dorsal edge, and the beard is on the end and rather thin, but very longy 

 equal to the long hairs on the dorsal side. 



Larva less than 3^ mm. in length. 



Pupa. 



The pupa has very short stout dark trumpets^ and very marked plumes on 

 the thorax. There are no plumes on the sixth segment, only a single hair on 

 each corner ; the plumes on the seventh segment are small and o£ subplumose 

 hairs; the anal plates have some minute scales on their basal outer edge, and 

 the ribs are very chitinous (PL V, figs. 13 & 14) . 



Length o£ thorax less than 2 mm. 



Described from three larvae and three pupae. 



[Larvse found in the water in an earthen fetich-pot standing under a palm 

 tree outside Yaba village in June. — W. M. G.] 



7. Stegomyia pollinctor, Graham. 



Larva. 

 Larpe-headed forms Avith rather thin abdonien. 



CD 



Head not quite so broad as the thorax, dull opaque yellow, and with rather 

 marked pigmentation ; the base of the mandibles, the base of the under surface,, 

 the parts leading to the under Up, and the usual marks at the bases of the 

 brushes, are all of a darker colour. The antenna is dark and has, or appears 

 to have, a few simple hairs in the usual place oE the plume ; the solitary 

 specimen is much damaged and one antenna is missing. The maxillae have 

 dark hairs at their ends, and the brushes are large. The face is much denuded,, 

 but on one side a plume remains, small in size and having four simple hairs ;, 

 there are besides a few single and double simple hairs. The eyes are very 

 large, as are also the pigment spots behind them. 



The thorax has the usual plumes, small in size and of subplumose hairs ; 

 and on the anterior portion of the dorsum, two stellate hairs of fair size, close 

 to and on either side of the neck ; these, if they are a constant character, are 

 obvious, and of use in determination. 



The plumes on the first tw^o segments of the abdomen are short and sub- 

 plumose ; the hairs on the other segments are simple and consist of moderately 

 long hairs on the ventral sides, with stellate hairs higher up ; the seventh 

 segment has from three to four minute tufts on its sides, and a larger 

 quadruple hair (the hair equal to half the breadth of the segment) ; all these 



