668 DIPTERA OF AU8TRALIA, 



clothed with a short pubescence ; in the ^ almost cylindrical, 

 more or less dilated towards the middle, with strongly developed 

 holding-forceps ; in the 9 acuminate, the ovipositor provided with 

 small terminal lamellae. 



The Sciaridae generally present a uniform livery of some 

 shade of brown or black, and in the venation of the wings 

 strikingly remind us of the Cecidomyidae Vjelonging to the sub- 

 family I-ESTREMINA, and of the Mycetophilidse in their generally 

 microscopically pubescent membrane. The largest known Aus- 

 ti-alian example measures nearly five lines in expanse, and the 

 smallest rather more than a line. 



The following synopsis is appended to set forth Winnertz's 

 distribution of the genera : — 



A. Flagellar joints of the antennae cylindrical, pedicelled, or 

 sessile. 



SciARA, Meig. — Wings longer than the abdomen, their surface 

 microscopically pubescent ; wing-lobes more or less developed 

 Joints of the antennae pubescent. 



Trichosi.\, Winn. — Wings as in Sciara, h»ut their surface 

 distinctly hairy. 



Cratyna, Winn. —Wings as in Sciara, but the cubitus (second 

 longitudinal vein) united with the costa by a radial vein. 



CoRYNOPTERA, Winn. — Wings claviform, their surface micro- 

 scopically pubescent ; antennai of the ^ pedicelled, verticillate. 



Bradysia, Winn. — Wings narrow, shorter than the abdomen, 

 their surface microscopically pubescent. 



Epidapus, Hal. — Wings and halteres wanting. 



B. Flagellar joints of the antennje in the ^ ovate, with long 

 pedicels, in the 9 cylindrical, sessile. 



Zygoneura, Meig. — Wings a-s in Sciara, but the large fork 

 •bellied at the base and its branches undulated 



