BY G. H. HARDY. 119 



-one band through base of discoidal cell to the tip of the 

 5th posterior vein; a second from stigma through tip of 

 discoidal to apex of 4th posterior; a third half way be- 

 tween this to the tip of the wing, reaching into the 3rd 

 posterior cell; and finally the wing is bordered fuscous 

 from the apex to the anal vein. The sexes are very simi- 

 lar, the' eyes contiguous in $ , and widely sepaxate in $ . 

 In respect of the former the abdomen is much more slender 

 and cylindrical. 



Length $ 5-6 mm., ? 4-7 mm. 



Hab. Tasmania, Hobart, September to November; 

 JSTew South Wales, Sydney, June; Western Austo-alia, 

 Perth. 



The specimen utilised for the above description is in 

 the Australian Museum, and was captured at Neutral 

 Bay, Sydney, on the 7th June, 1917. (Collector. — ^A. 

 Musgrave.) 



The species is abundant during part of the year, and 

 w-ill probably be found to have a wide distribution in Aus^ 

 tralia. 



Fam. LEPTID/E. 



The known Australian genera may be characterised as 

 follows : — 



Thorax, scutellum, and abdomen without bristles, the 

 bristles of the legs if present are either thin or small. 

 Abdomen either elongate and tapering, or conical. Anal 

 cell closed, or at most narrowly open at border ; cubita.1 

 vein forked; 4 or 5 posterior veins, all reaching margin 

 •except in genus Sijaniopsis, where the third posterior vein 

 is stunted if present. Antennae three jointed at least, the 

 third joint bearing an appendage of apical joints in the 

 form of an arista thickened and composed of more than 

 ■one joint, thickened basally and unjointed, or hairlike. 

 TibicC with or without apical spurs. 



Metopnnia ruhriceps, Macq., belongs to the Stratio- 

 unyiidce- 



Glirysopilus duhius, Macq., belongs to, and is treated 

 in, the B,hyp]iidce above. 



The following key will separate the known Australian 

 'Genera : — 



Key to the Genera of Australian Leptidce. 

 1. Five posterior cells 2. 



Four posterior cells 5. 



■2 Fourth posterior cell closed Clesthenia. 



Fourth posterior cell open 3. 



