] 
mocoe 
/ 
‘ 
. 
Hae 
a. 
ar 
&. 
eo 
Nort? 
Trans. Ent. Soc. Lond., 1921, Plate X VIII. 
CTT 
ee. ee wD, | 
y se 
J. B. Gatenby del. 
Vaus & Crampton, Lid. 
A S. NIGERIAN AQUATIC DIPTEROUS LARVA 
(? Syrphidae). 
