1186 
DIPTERA OF AUSTRALIA, 
IJah. — Lawson, Blue Mountains (Masters) ] Knapsack Gully,. 
Blue Mountaius, and Middle Harbour (Skuse). September to 
January. 
153. Antriadophila petulans, sp.n. (PI. xxxi., tig. 8). 
— Length of antennae 0 030 inch ... 0’76 millimetre. 
Expanse of wings 0*120 x 0'045 ... 3*04x 1 13 
Size of body 0*120x 0*020 ... 3*04x0*50 
— Length of antennae 0*025 inch ... 0*62 millimetre. 
Expanse of wings 0*120x0*045 ... 3*04x 1*13 
Size of body 0*120x 0*020 ... 3*04x0*50 
^ and 9. — Antennae slender, much shorter than the thorax ; 
joints of the scapus deep brown, not so dark as those of the 
tiagellum ■, flagellar joints fuliginous, considerably smaller than 
the joints of the scapus. Front and vertex black. Hypostoma, 
palpi, and proboscis deep dusky brown. Thorax brown or light 
brown, with three longitudinal double rows of short black hairs, 
which become single rows posteriorly, and are not coalescent ; 
in a light brown thorax the space between the longitudinal rows 
of hairs appears darker, particularly on the anterior half ; lateral 
borders and scutellum setiferous ; pleurai and metathorax brown 
or deep brown. Halteres wholly yellow, with a sprinkling of 
minute hairs. Abdomen rather more than twice the length of 
the thorax, brown or deeji brown, the last two segments frequently 
black or nearly black, densely clothed with black or deep brown 
hairs ; in the ^ not as wide as the thorax, forceps small ; in the 
^ wider than the thorax, the terminal lamellte brown. Coxa3, 
femora, and tibiae ochraceous or brownish-ochraceous, the fore 
coxae sometimes bi’own on the front ; tarsi dusky brown. Tibial 
spurs black ; the intermediate and hind tibiae with minute lateral 
spines. In the fore-legs the tibiae about J longer than the meta- 
tarsal joint (3:2). Wings pellucid with a very pale greyish- 
brown tint, perceptibly darker at the apex and on the posterior 
border about the branches of the fourth longitudinal ; brilliantly 
iridescent ; veins brown, the costal and first two longitudinal 
