BY FREDERICK A. A. SKUSE. 781 



9. — Length of antennae 0-065 inch .. 1*66 millimetres. 



Expanse of wings 0'320 x 0-080 ... 8'12 x 2-02 



Size of body 0-290 x 0-040 ... 7-35 x 1-01 



. Dark brown. Head, including proboscis, palpi and antennre 

 sometimes black. Palpi four-jointed. Thorax light brown at 

 the humeri ; an intermediate brown stripe visible anteriorly. 

 Halteres brown, somewhat ochreous at the base of stem. Abdomen 

 blackish-brown ; $ forceps concolorous with rest of body ; 9 ovi- 

 positor rather short, straight, the valves obscure testaceous. Legs 

 entirely brown. Wings with a slight greyish tint, with very pale 

 greyish-brown clouds ; the stigma slightly darker ; a squarish 

 cloud at origin of second longitudinal vein, reaching costa ante- 

 riorly and fourth longitudinal posteriorly ; a cloud between stigma 

 and lower extremity of great cross-vein ; and another at distal 

 end of discal cell ; the costa at end of marginal and sub-marginal 

 cells somewhat clouded ; veins dark brown. Auxiliary vein 

 reaching costa more or less opposite middle of prsefurca ; sub-costal 

 cross-vein near its tip ; tip of first longitudinal and the marginal 

 cross-vein pale ; prsefurca much angulated near its orgin ; great 

 cross-vein at inner end of discal cell. 



JIah. — Lawson, Blue Mountains, N.S.W. (Masters). January. 



Genus 4. Limnobia, Meigen. 



Limnobia, Meig., Syst. Beschr. L p. 116, 1818; Limonia, Meig., 

 111. Mag. II. p. 262, 1803 ; Limnohia and Glochina, Meig., Syst. 

 Beschr. YI. pp. 275-280, 1830 ; IdioiMra, Limnophila, and Lim- 

 nohia, Macquart, S.a B. I. pp. 94, 95, 100, 1834 ; Walker, Ins. 

 Brit. III. p. 280, 1856 ; Zetterstedt, F. Lapp. 1840, Dipt. Scand. 

 X. 1851 ; Limnohia (in its restricted sense), Stephens, Cat. Brit. 

 Ins. 1829 ; O.-Sacken, Mon. Dipt. K Amer. IV. p. 84, 1869 ; 

 Studies, IL p. 177, 1887. 



" One submarginal cell; four posterior cells; a discal cell. The 

 marginal cross- vein is sometimes at the tip of the first longitudinal 



