THE PUPAE OF WEST AFRICAN MOSQUITOS. 



85 



sometimes quadruple and the tuft internal to it comprises 5 to 7 hairs. On the 3rd 

 segment there is a tuft of 7 or more hairs on the posterior margin a little internal to 

 the angle. There are only a few small setae at the posterior angle of the 2nd, 3rd, 



Fig. 7. Culex fatigans, Wied. 



and 4th segments. The dendritic setae on the 1st segment are well developed, there 

 is also a pair of small dendritic setae on the 2nd segment. The pupal trumpets are 

 relatively short, but have a large aperture. 



Culex invidiosus, Theo. (fig. 8). 



The paddles are similar to those of C. fatigans, that is, they are pyriformand have a 

 well developed midrib, a slight external thickening, but no fringe. At the free end of 

 each midrib are two small setae, set close together, one of which is a little larger than 

 the other. The pupa is, however, much more delicate than that of C. fatigans and 



Fig. 8. Culex invidiosus, Theo. 



is but poorly chitinised. The 8th segment bears a tuft at its posterior angle, and a 

 delicate double hair close to the insertion of the paddle. The tuft is composed of 

 7 to 9 branched hairs. There are several delicate setae near the posterior angle of the 

 7th segment the most conspicuous of which is a tuft composed of 2 to 4 hairs, which 

 may be either simple or subplumose. This tuft lies a little above the angle and close 

 to the lateral margin of the abdomen. On the posterior margin of this segment and 

 about half way between the angle and the mid line, there is a delicate tuft of about 

 4 hairs. The 6th segment has a delicate tuft of about 5 hairs in the posterior angle, 

 an extremely long double seta on the posterior margin a little internal to the angle, 



