THE PUPAE OF WEST AFRICAN MOSQUIT08. 75 



The pupae of Eretmopodites, the only genus of the tribe Sabethini at present 

 known to occur in Africa, differ from those of the Sabethini described by Howard, 

 Dyar and Knab, as has already been pointed out, in having well-developed 

 midribs in the paddles, and long terminal setae or tufts of setae. The five species 

 described, including one described by Bacot which is known only in the pupal stage, 

 can readily be distinguished, as shown in the following table. 



Genus Eretmopodites, Theo. 



1. Single stout seta on the end of the paddle 



Tuft of about a dozen setae on the end of the paddle 

 Tuft of about half a dozen setae on the end of the paddle 



2. A single stout seta on the posterior angle of the 8th segment 

 Tuft of long setae on the posterior angle of the 8th segment 



3. Tuft of four setae on the posterior angle of the 7th segment 

 Tuft of six setae on the posterior angle of the 7th segment 



Genus Anopheles, Mg. 



2 



E. quinquevittatus. 



E. inornatus. 



E. ? (undetermined). 



3 



E. chrysogaster. 



E. dracaenae. 



The pupae of only four West African species of this genus have hitherto been 

 described in this way, namely those of A. costalis, A. pharoensis, and A. mauritianus 

 by Wesche, and A. funestus figured by Bacot. The latter author also figured 

 A. costalis. The pupa of A. marshalli is described here for the first time, and further 

 details are given of those of A. pharoensis and A. mauritianus so as to make the 

 descriptions of all the five species comparable. 



Anopheles marshalli, Theo. 



The pupal paddles are somewhat narrow, with a marginal fringe on the outer 

 side. The thickening of the outer margin of the paddle or buttress, described by 

 Wesche as present in the Anopheline pupae he examined, is also present in this 

 species, but is less well developed than in A. costalis. There are two setae near the 

 distal end of the midrib, the more distal one being the longer and stouter. The 

 latter seta is not bent into a hook, as in the case of A. costalis and A. funestus in 

 Bacot's figures, but is gently curved with the convexity inwards. The seta at the 

 posterior angle of the 8th segment consists of branches coming off a main stem ; 

 the main stem is, however, much shorter than that of the lateral hairs of A. costalis. 

 The 7th segment carries no lateral tuft, but bears a single seta at its posterior angle, 

 which is simple, and internal to it there is a longer but more slender seta, also 

 simple. On the posterior border of the 5th and 6th segments there are similar setae, 

 but the inner setae are usually double, and between them and the setae at the 

 angles there are smaller double hairs, which, however, are larger than the similar 

 hairs on the 7th segment. At the posterior angle of the 4th segment there is a small 

 knob-like seta. On the posterior margins of the 2nd, 3rd, and 4th segments there 

 are several single, double and triple hairs, none of which however are strongly 

 developed. 



