Seance du 24 Décembre l ( J2â 
369 
of the male with a group of long hairs at the 
middle beneath . Culex laurenti, Newst. 
KEY TO THE FOURTH STAGE LARVAE 
OF EGYPTIAN MOSQUITOS. 
1. Siphon absent. (Ï.NOPHELINI) . 2 
Siphon present. (CULICINÏ) . d 
2. Antenna with a tuft of several hairs on the shaft.. 
. Anopheles mauritianus, Grp. 
Antenna with only a minute single hair on the 
shaft . 3 
3 . Outer clypeal hair dendriform . 
. Anopheles pharoensis, Theo. 
Outer clypeal hair simple . 4 
4. Palmate hairs on the metathorax to seventh abdo¬ 
minal segments inclusive . 5 
Palmate hairs on the second to seventh abdomi¬ 
nal segments only .. 
. Anopheles superpictus, Grassi. 
.and A. multicolor, Camb. (*) 
5 . Head mainly covered with dark markings. Meta- 
thoracic float hairs with 10-11 leaflets. Comb 
(*) The distinction between the larvae of- these two 
species given by Buxton (Bull. Soc. Eut. d’Egypte, 1923, 
p. 46, figs. 6a and 6b, is invalid as regards Egyptian spe¬ 
cimens of A. multicolor, which invariably have the inner- 
most shoulder-hair quite as plumose as that shown in his 
figure of A superpictus. 
