THE PUPAE OF WEST AFRICAN MOSQUITOS. 83 



Genus Mansonioides, Theo. 



The early stages of Mansonioides uniformis are not known. The pupa of 

 M . africanus can readily be distinguished from all other known West African pupae 

 by the structure of the trumpet, which is developed at its distal end into a spine 

 suitable for piercing the roots of the water- weed Pistia stratiotes, but it can also be 

 separated from pupae of other genera of the tribe Culicini by the characters of the 

 paddles alone. 



The structure of the paddles has been figured by Ingram (Bull. Ent. Res. iii, 

 p. 377) and it is only necessary here to add that the ends are slightly thickened 

 and that apparently there are no terminal setae. At the posterior angles of the 

 7th and 8th segments there are large single setae in place of tufts. 



Genus Aedomyia, Theo. 



Aedomyia africana, N.L. (fig. 6). 



The paddles are pyrif orm, slightly notched, and without a fringe ; the outer margin 

 is a little thickened and the midrib is well developed. There is a single stout terminal 

 seta at the end of the paddle about as long as the paddle itself. In the middle line 

 and at the distal end there is a slightly darkened patch. 



Fig. 6. Aedomyia africana, N.L. 



The tufts at the posterior angles of the 8th segments are well ' developed and 

 consist of four branched hairs. On the 7th segment there is a stout double seta 

 at the posterior angle, and internal to it another tuft formed by the branching of a 

 stout seta the median element of which is extremely long. Similar long tufts, or 

 more correctly dendritic setae, are also present on the 4th to the 6th abdominal 

 segments. Internal to these, and in a similar position on the 1st, 2nd and 3rd seg- 

 ments also, there is a tuft of slender hairs. The dorsal tuft on the 1st abdominal 

 segment is poorly developed. 



There are several tufts on the thorax, one of which lies just behind the trumpets 

 and another at the posterior margin. The trumpets are not very long, but are 

 highly chitinised. 



G enus Culex, L. 



1. Tuft at the posterior angle of the 8th segment containing 



branched hairs . . . . . . . . . . . . . . . . . . 2 



Tuft on the 8th segment of subplumose hairs . . . . . . . . . . 7 



2. Tuft at the posterior angle of the 7th segment containing 



branched hairs . . . . . . . . . . . . . . . . . . 3 



Tuft on the 7th segment of subplumose or simple hairs . . . . . . 5 



(C365) f2 



