3>UrAL STAGES OF WEST AFIIICAX CULICID.E. 4$. 



Length of larva (without siphon) jnst over 5 mm., length of siphon nearly 

 2 mm. 



Pupa. 



Rather small, with moderate trumpets,, which have a slight indentation at; 

 the mouth. At the base o£ the thorax is a brush of short hairs (not a plume),, 

 and a few longer hairs are more anteriorly placed ; there are also some com- 

 pound hairs at the spot where the neck shows through the sac. These are 

 the appearances seen under the compound microscope with an absolutely 

 riffid anale of vision. Focussing' down it will be seen that the brushes and 

 hairs are double, but I think it will be best to keep to one focus in describing 

 the pup?e. 



On the edge of the first segment (or what appears to be the first segment) 

 are paired plumes of stellate hairs, and all the segments are haired at their 

 edges ; the seventh segment has a pair of small plumes of branched or 

 subplumose hairs on the posterior angles (PI. I, figs. 5 & 6). The anal plates 

 are of the usual subcircular shape. 



The thorax at its longest part is under 2 mm. 



Described from eight larv?e and five pup?e. 



[Larvae found in an earthen fetich-pot placed upon a small mound outside^ 

 a native village, in May. The pot contained clear brownish water above a 

 deep layer of mud, decayed leaves and small twigs. — AV. M. G.] 



21. Culex aquihis, Graham. 



Larva . 



Head large in proportion to the thorax, quite as broad in its widest part. 

 Colour fairly light. Antennae like those of C. alhovmfatus, Graham, except 

 that the distal hairs are simple and not branched; the mouth-parts are very 

 bushily haired, especially the brush. Plumes on face much denuded in four 

 larvae examined, but probably short and not conspicuous. 



Thorax well difEerentiated from abdomen, with the normal plumes and 

 frontal hairs. 



Abdomen not conspicuously hairy, but on the fourth and sixth segments 

 long single subplumose hairs are present in two of the four specimens. 

 Small stellate hairs were seen on several segments, but were not sufficiently 

 symmetrical to be described as characters. Comb rather larger, comprising 

 four rows of scales reaching from the base of the siphon to the middle of the 

 eighth segment and consisting of about 25-30 scales, of which the posterior are 

 the largest (PI. I, fig. 14). The sub-siphonal plumes are well developed, and 

 formed of the usual jdumose hairs. The anal plume consists of three simple 

 hairs. 



The siphon is fairly long and thin, being two-thirds of the length of the 

 abdomen and 9-10 times as long as its base. The spines are fairly long and 



