386 DIPTERA OF AUSTRALIA, 



A . Wings without a white spot on the middle of the anterior border. 



441. Lasioptera virgata, sp.n. 



(J. — Length of antennae 0*020 inch ... 0*50 millimetre 



Expanse of wings 0-090 x 0-030 ... 2-27x0.76 



Size of body 0-090x0-015 ... 2-27x0-38 



^. —Length of antennae 0-030 inch ... 0-76 millimetre. 



Expanse of wings 0-085x0-040 ... 2-14x101 



Size of body 0-095x0-020 ... 239x050 



Antennae in the -J rather shorter, in the $ 2- + 20-jointed, rather 

 onger than the thorax ; joints of the scapus brown^ with niveous 

 scales; flagellar joints black, sessile, sub-elliptical, with tolerably 

 long, sparse, verticils. Head covered with yellow scales. Eyes 

 contiguous on the front. Facies and palpi covered with niveous 

 scales. Thorax adorned with yellow scabs, with two longitudinal 

 rows of long yellow hairs, and yellow hairs at the humeri and 

 on the lateral borders ; some niveous scales and hairs under the 

 root of the wings ; pleuraj deep brown ; scutellum covered with 

 yellow scales, and fringed with long hairs ; metathorax deep brown. 

 Halteres ochraceous or very pale brown, microscopically scaled. 

 Abdomen in the ^ as wide as the thorax and about three times 

 its length, in the ^ somewhat more robust ; dorsal segments black 

 or very deep olivaceous-brown, bordered posteriorly with a bx'oad 

 band of silvery scales ; covei-ed with white scales beneath ; 

 appearing })ale brown where the scales are removed ; ^ forceps 

 pale brown, scaly ; ^ ovipositor ochraceous, more than half the 

 length of the abdomen. Legs long and slender, densely clothed 

 with scales. Coxae deep brown, with white scales and hairs ; 

 femora pale yellowish or whitish at the base, brownish for the 

 apical half on the upper side ; tibiae brownish or dusky, sometimes 

 ochraceous beneath : tarsi almost fuliginous, with weak greyish 

 reflections in a certain light, the last two joints, and sometimes 

 also the tip of the third joint white. Wings pale brown at the 

 root, hyaline, with a weak cupreo-roseous reflection ; pubescence 



