78 



A. INGRAM AND J. W. SCOTT MACFIE. 



.. 2 



..a 



Mansonioides. 



Uranotaenia. 



Eumelanomyia. 



.. 4 



.. 5 



.. 6 



Aedomyia. 



Aedes. 



Mimomyia. 



.. 7 



Culiciomyia. 



Culex. 



Tribe CULICINL 

 Table of Genera. 



1. Paddles of unusual shape.. 

 Paddles of usual shape, oval or pear-shaped 



2. Paddles narrow, without fringe ; end of trumpet meta 



morphosed into a spine 

 Paddles " knife-like," inner lobes larger than the outer 



3. End of midrib thickened and tube-like 

 End of midrib not thickened, terminal setae present 



4. Terminal setae long 

 Terminal setae short 



5. Terminal setae very long ; stout dendritic seta with a very 



long central branch a little internal to the tuft on the 7th 

 segment 

 Terminal setae shorter ; no such dendritic seta on the 7th 

 segment 



6. Tuft oh the 8th segment small, no tuft on the 7th ; paddles 



more or less infuscated 

 Tufts on the 7th and 8th segments well developed 



7. Long double hairs arising near the eyes 

 No such hairs 



In the above table no attempt has been made to separate the genera Stegomyia 

 and Ochlerotatus, but this will be referred to later when dealing with Aedes. 



Culiciomyia nebulosa possesses the two conspicuous hairs arising from a point 

 near the eyes described by Wesche as present in the species he knew as 

 C. freetownensis and C. cinerea, both of which have been sunk by Edwards. We do 

 not know if these hairs are present in other species of Culiciomyia, but as we have 

 not observed them in any species of Culex it is possible they may prove to be a 

 distinguishing feature. 



Genus Aedes, Mg. 



The only species of Ochlerotatus that we have had the opportunity of examining 

 differ from Stegomyia in having a small dendritic tuft on the 2nd segment similar 

 to, but much smaller and more delicate than, that on the 1st segment. It may be 

 possible therefore to differentiate these genera as follows : — ■ 

 Tuft on the 1st abdominal segment dendritic, almost no stem ; 



similar but smaller tuft on the 2nd segment 

 More decided stem to the dendritic tuft on the 1st segment ; no 



similar tuft on the 2nd 



Genus Stegomyia, Theo. 



1. Tuft of setae on the posterior angle of the 7th segment 

 Single or double seta on the 7th segment 



2. Paddles without a fringe 



Paddles with a fringe 



Ochlerotatus. 



Stegomyia. 



♦ 

 .. 2 

 .. 4 



S. sugens. 



.. a 



