38 DIPTERA OF AUSTRALIA, 



Winnertz in 1853 contributed another admirable monograph 

 towards a knowledge of European gall-midges (Linnaea Entoni. 

 Yol. viii.), when he described a large number of fresh species, and 

 added another genus Spaniocera, and a sub-genus of Cecidomi/ia 

 which he designated Colpodia. After a lengthy and careful study 

 of the material at his disposal, he expressed his conviction that all 

 the sub-genera of Loew were founded on good characters, but that 

 some of them required a more exact diagnosis, and that a still 

 further division of them would greatly promote the determination 

 of the species ; and in order to fulfil this requirement he distributed 

 the species of the first sub-family as below : — 



I. Cecidomyia, Meigen. 



I. Wings with three longitudinal veins. 



A. Transverse vein placed between the I'oot and the tip of 

 the first longitudinal vein. 



Cecidomyia. — The second longitudinal vein ascending from the 

 base in a flattened arcualion, and reaching the margin of the wing 

 a little before its apex. 



The number of the antennal joints usually equal in both sexes, 

 the joints either pedicelled or sessile. 



1. Antennal joints in the ^ pedicelled, in the $ se-ssile. 



2. In the ^ and $ pedicelled (or the 9 partly so). 



3. In the ,^ and 9 sessile. 



Diplosis. — The second longitudinal vein ascending from the 

 base in a flattened arcuation, and reaching the margin of the wing 

 at or beyond its apex. 



Antennge in the ^ 2- -i- 24-jointed, sometimes with one rudi- 

 mentary joint more, the pedicelled joints alternately single and 

 double, very seldom all the joints simple, in several species the 

 joints decorated with long hairs in the upper side. 



