﻿KNOWN LARVAE OF AFRICAN CULICINAE. 



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of Anopheles. Secondly, the specific characters of Anopheles larvae are less 

 well defined, or at least are more minute, than in those of other Cultcidae, and 

 hence errors of determination are easily made. 



One probable case of such error is the larva described by Newstead and Carter 

 as that of A. squamosus, var arnoldi, Chr. This larva has an antennal hair-tuft, 

 and in several other points agrees with Hill and Haydon's description of A. 

 mauritianus (paludis), while it is very different from the form which Hill and 

 Haydon figure as A. squamosus. It seems possible, if not probable, that the 

 larvae in question are really those of A. mauritianus. I have been unable to 

 separate the supposed larvae of A. squamosus and A. pharoensis. 



Genus Toxorhynchites, Theo. 



T. brevipalpis, Theo. As this is the only common African species, and the 

 only one recorded from Sierra Leone, I have no hesitation in assigning to it a 

 larva taken at Moyamba, Sierra Leone, by Dr. J. S. Pearson, in August 1912. 

 This is the only Toxorhynchites larva that has been received here from Africa. 

 The larva should be distinguishable by its large size alone, but the following brief 

 description should make its determination easy : 



Head large, highly chitinised ; median hairs absent. Antennae rather short, 

 cylindrical, without tuft, but with two or three fine single hairs near apex. 

 Thorax with the plumose hairs short and thick, median ones rudimentary. 

 Abdomen with plumose hairs on every segment, all set, like those of the thorax, 

 in small chitinous sclerites. A large lateral plate on the eighth segment, re- 

 placing the comb. Siphon not much longer than anal segment, no pecten ; 

 hair-tuft of three plumose hairs situated near the base. 



General appearance : dark brown above, light brown below. 



Fig- 1. — Stegomyia sugens (Wied.). 

 The hair beyond the tuft of the pecten is a very unusual feature. 



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