PUPAL STAGES OF WEST AFRICAN CULICJD.E. 45 



The anal segment is moderately long, with very long thin tapering papillae 

 of not quite equal size; they are about three times the length of the segment. 

 This has a plume (very unusual) and two long hairs on its dorsal edge, and 

 is heayily bearded all along its yentral surface; all these hairs are simple. 



Length of larya 4i mm., siphon oyer 1 mm. 



Pupa. 



The pupa is of fair size, with short trumpets and rather broad anal plates ; 

 the plumes at the ends of the seventh segment are small nnd apparently 

 (with 60 diameters) of simple hairs (PL III, fig. 1) . 



Length of thorax 1^ mm. 



Described from two larv?e and three pupae. 



[Larvae found in borrow-pits early in June. — W. M. G.] 



23. Culex lividocostalis, Graham. 



Larva. 



Head of moderate size, slightly dark in colour. Antenna? with a large 

 plume of plumose hairs and simple hairs at the end. Plumes on face long,, 

 but of few hairs ; the four central ones consist of two hairs each, and the 

 outer of six hairs, all plumose. 



Thorax well marked, with normal plumes. 



Abdomen with but few long hairs, and those simple or subplumose, but a 

 number of minute stellate hairs are to be found on the ventral edges of the 

 segments, and also higher up on the sides. The comb is large, consisting of 

 very small '^ comma " scales, anteriorly in a long row, and then forming- 

 three scattered rows of longer scales ; under favourable conditions it can be 

 seen that the larger carry some lighter structure at their end. 



Siphon thin, moderately long, about one-third (9 to 24) the length of the 

 abdomen ; eight times as long as the base ; about 12 spines, which are 

 distinctly serrate on their edges, run for nearly a third of the length (PI. lY, 

 figs. 12 & 13). 



Anal segment fairly long, with tAvo of the papillae about as long as the 

 segment, and two perceptibly shorter ; it carries long hairs on the dorsal 

 edge, with a beard ventrally on the distal third, which is much denuded in 

 the specimens ; there are single simple lateral hairs on the upper part. 



Larva 44 mm. long, siphon 1|- mm. 



Pupa. 

 The pupa has fairly long trumpets which are darker at the ends and base ; 

 it has rather more hairs on the abdomen, which are mostly stellate and always 

 simple, as are the two plumes on the sixth and seventh segments ; there are 

 very minute hairs on the ribs of the anal plates (PI. lY, fig. 14). 



