﻿Known larvae of African culicinae. 38l 



5. Siphon 4x1; pecten with about 9 teeth ; antennal tuft at 



about J- ... ... ... ... ... quinquefasciatus, Say.* 



Siphon longer ; pecten with 12-15 teeth; antennal tuft at about f 6. 



6. Siphon 5x1 pipiens, L. 



Siphon 8 x 1 ... ... ... ... decern, Theo, ; invidiosus, Theo. 



7. Comb with 15-18 teeth, in two or three irregular roAvs ... ... 8. 



Comb with 4-8 teeth, in one row ... ... ... ... ... 9. 



8. Siphon longer than the abdomen, 20 x 1 ... ... guiarti, Blanch. | 



Siphon about the same length as the abdomen, 13 x 1 ...grahami, Theo. 



9. Siphon as long as abdomen ; pecten with about 13 teeth, the last 



six far apart and reaching more than two-thirds of the length of 



the siphon .,. ... ... ... ... ... ... pruina, Theo, 



Siphon not more than half as long as abdomen, pecten with at 

 most 10 teeth, which reach at most one-third the length of the 

 siphon ... ... ... ... ... ... ... ... 10. 



10. Siphon with a more or less evident dark ring at one-third, the 



hair-tufts very long ; head very dark ... ... quasigelidus, Theo. 



Siphon unicolorous, the hair- tufts short and inconspicuous ; head 

 not very dark ... ... ... ... ... ... ... 11. 



11. Siphon less than half as long as abdomen ; antennal tuft just 



before middle ; pecten with five teeth, very short and close 

 together ... ... ... ... ... ... annulioris, Theo. 



Siphon about half as long as abdomen ... ... ... ... 12. 



12. Pecten with only three teeth ; antennal tuft just beyond middle 



ager (Giles), var. ethiopicus, Edw. 

 Pecten with six teeth, the last two more detached univittatus, Theo. 



There is unfortunately some confusion between the larvae of C. invidiosus and 

 C. univittatus. The former have been received from Lagos {Dr. W. M. Graham) 

 and Accra {Dr. A. C. Connal), while larvae identical with these, received from 

 Bole (Dr. A. Ingram), were labelled as those of C. univittatus. Dr. Ingram also 

 sent a perfectly distinct larva which was labelled as that of C. invidiosus. I have 

 assumed that the labels have been accidentally transposed in the case of 

 Dr. Ingram's specimens, and have taken the species labelled C. invidiosus to be 

 C. univittatus. 



I am unable to separate the larvae of C. deeens (=C. nigrocostalis, Theo. and 

 C. lividoco stalls, Graham) and G. invidiosus (=C. aquilus, Graham), the 

 characters given by Wesche being unreliable, but I believe the two are distinct. 

 In the adult, C. deeens can be distinguished by the reddish thorax (that of 

 C. invidiosus being brownish), and (in the male) the banded abdomen. In the 

 female the abdominal banding is not constant ; the bands in C. deeens are always 

 narrow and may sometimes be interrupted. However, a close microscopical 

 examination of the genitalia of a number of males of each species failed to 



* Characters given by Dyar and Knab. This is the species often referred to as fatigans. 

 Wied. 



f This determination is questionable. No specimens of C. guiarti from Lagos are in the 

 British Museum Collection. 



