152 A. INGRAM AND J. W. S. MACFIE. 



hairs are well developed, consisting of three hairs above and one below on each side: 

 The anal papillae are slightly longer than the anal segment (35 : 30 units) and are 

 subequal with rather pointed ends. 



This larva may be distinguished from other Culex larvae having siphon tubes 

 8 X 1 by the possession of a comb consisting of 7-8 spines (Edwards' key, Bull. Ent. 

 Kes., iii, pp. 380-381). 



Breeding place. — These larvae were found at Nsawam (Plate I, fig. 1), 25 miles 

 north of Accra, in a swamp (covered with Pistia stratiotes) which lies on both sides of 

 the railway embankment, and were associated with the larvae of Mansonioides 

 africanus and Mimomyia splendens. 



Mimomyia splendens, Theo. (fig. 8). 



The larva resembles those of Mimomyia hispida and M. mimomyia for mis in the 

 shape of its antennae and in the hirsute appearance of its head. 



The head is dark and large, though not so broad as the thorax. The antennae 

 are curved, with a tuft of plumose hairs at about two-thirds of the basal portion ; 

 they are possessed of divergent apical pieces similar to those of M. hispida and 

 M. mimomyiaformis, these pieces being devoid of the spicules present on the 

 basal portions, and at their junction with the basal portions are two long bristles. 

 The apical piece in this larva does not appear to be lighter in colour than the rest 

 of the antenna. A bifurcated subplumose hair extends laterally from the head in 

 front of the eye, as in M. hispida, and there is a small plume of simple hairs on the 

 dorsal surface of the head immediately internal to the eye. The mental plate is 

 small and flat, with a central tooth and six teeth on each side, the outermost of which 

 are the smallest. All the frontal hairs are strongly plumose, the ante-antennal 

 plumes resembling feathers. 



The long hairs on the thorax are plumose. The lateral abdominal hairs on the 

 first two segments are multiple, large and plumose, those on the remaining segments 

 being plumose, small and paired ; and on all the abdominal segments there are 

 conspicuous stellate hairs. The comb consists of a single row of large spines, 6-7 in 

 number. The siphon is about three times as long as the diameter of its base, the 

 pecten being formed of two spines, which are placed vertically and not horizontally 

 as in M . hispida. There is a hair-tuft of subplumose hairs about the middle of the 

 siphon and a pair of hooks on the dorsal valves. The subsiphonal plume is formed 

 of subplumose hairs, the hairs of the siphonal plume being pubescent, while the 

 anal plume consists of simple hairs ; there are also two independent hairs, which 

 are branched, on each side of the subsiphonal plume. The anal segment is longer 

 dorsally than ventrally, has its posterior border edged with spicules, long and short 

 spicules alternating, and possesses a single long and subplumose hair on its lateral 

 aspect. The dorsal hairs are collected into tufts and are more strongly developed 

 than the beard. The anal papillae are short, nearly equal in length (the ventral pair 

 being slightly longer), and have pointed extremities ; they are about half the length 

 of the anal segment. 



This larva may be distinguished from the larva of Mimomyia mimomyiaformis,. 

 which also possesses an antenna with a divergent apical piece and a comb of 6-7 

 spines in a single row, by its pecten of relatively strongly developed spines. 



