844 DIPTERA OF AUSTRALIA, 



Q. — Length of antennae '05 5 inch ... 1*39 millimetres. 



Expanse of wings 0*240 x 0-065 ... 6-09 x 1-66 



Size of body 0-130 x 0-030 ... 3-30x0-76 



Head, including rostrum, palpi, and antennse light fulvous-yellow 

 to brownish ; flagellar joints slender, cylindrical, with spare bristly 

 verticils. Thorax pale fulvous, somewhat shining, with two longi- 

 tudinal rows of yellow hairs. Halteres yellow. Abdomen brown 

 or brownish, more or less tinged with ochreousor fulvous ; clothed 

 with yellow hairs ; ^ forceps of ordinary type, concolorous with 

 rest of body ; ^ ovipositor nearly straight, ochre-yellow. Legs 

 yellow, densely clothed with tolerably long yellow hairs ; tibial 

 spurs small. Wings pellucid, with a faint yellowish tint ; veins 

 yellowish ; stigma indistinct ; the origin of the prsefurca with a 

 small, but distinct, brownish cloud ; cross- veins and tips of all the 

 veins just perceptibly clouded. Auxiliary vein shorter than usual, 

 reaching costa beyond origin of second longitudinal vein a distance 

 equal to about length of great cross- vein ; sub-costal cross- vein a 

 little beyond origin of the latter ; prsefurca moderately lono-, 

 angularly bent at its origin, with a short stump of a vein, the rest 

 straight ; petiole of first sub-marginal cell somewhat more than 

 one- third the length of prsefurca ; marginal cross-vein situated at 

 inner end of first sub-marginal cell, and only a little before tip of 

 first longitudinal vein ; second sub-marginal cell somewhat longer 

 than first posterior ; inner end of latter in line with that of discal 

 cell ; second posterior cell short, less than half the length of third 

 posterior ; discal cell oblong ; great cross- vein situated at the 

 middle of its length ; seventh longitudinal vein a little curved at 

 its tip. 



Hab. — Lawson, Blue Mountains (Masters). Two specimens in 

 January. 



Ql)S. — This species seems to approach the L. recondita and L. 

 imhecilla group of Baron Osten-Sacken ; but the auxiliary vein is 

 shorter and the base of the second longitudinal differs in being 

 strongly angulated. 



