82 R. W. CROSSKEY 
antennal segment, completely haired. Antennae brownish orange basally, third segment 
dark brown except for some bright orange-red colour at junction with second segment, falling 
short of mouth-margin by twice the length of the third segment; third segment about 2-1 times 
as long as second segment. Palpitawny brown. Thorax. Ground colour brownish or black- 
ish, a little reddish on sides around the sutures of the pleurites; dorsum with dark coppery 
pink tinge to naked eye, and with traces of greenish yellow reflections under microscope 
(especially along transverse suture); trace of greenish reflection on sternopleura. All dorsal 
hair black; hair of pleural regions light yellow to pale golden orange, except for some blackish 
hairs on the upper and posterior parts of the mesopleura; hair also blackish on sides of humeral 
calli. Scutellum with 6-7 pairs of marginal setae (apicals included), the apicals as strong as the 
other marginals. Thoracic chaetotaxy not noticeably spiniform. Wangs. SBasicosta black. 
Wing membrane nearly clear hyaline, entirely microtrichiate. Calyptrae semi-translucent 
pale brownish, with pale yellow hair fringe. Legs. Reddish or reddish yellow except for some 
brown to blackish brown darkening on coxae and basally on femora, tarsi concolorous with 
tibiae. Most of the coxal hair and the long soft posterior hair of the fore and mid femora, also 
the long hair of the basal anterior surface of the hind femora, pale yellowish; other leg hair black, 
except for the usual reddish hair on the a and av surfaces of the fore tibia. Chaetotaxy of mid 
and hind tibiae variable: mid tibia either without or with one or two minute ad setae; hind tibia 
with short regular inconspicuous ad fringe (with or without a distinct ad seta submedially in the 
fringe), and with one or two fd setae. Claws long. Abdomen. Slightly paler than thorax, 
dark reddish brown with some darkening of hind margins of intermediate tergites (which appear 
slightly blackish to naked eye), and with a narrow blackish median line; intermediate tergites 
with slight coppery purple reflections and with traces of coppery green reflections in some lights; 
these tergites largely overlaid with very thin whitish pollinosity which is hardly at all visible 
to naked eye. All abdominal hair black except for a few pale yellowish hairs at extreme base 
of venter; long hairs and setae of T5 with reddish apices. T3 with a row of many median 
marginal setae, these rather short and slightly stubby. Dorsal hair of Tr + 2 and T3 recum- 
bent, that of T4 semi-recumbent basally but erect distally, hair of T5 very long and fine and 
entirely erect. Sternite 5 with each lobe very slightly excavate on apical margin. Genitalia 
with cerci and surstyli as in Text-fig. 56; surstylus of unusual form, very broad basally and with 
a blunt prong or tooth-like process on anterior edge submedially, excavate between this tooth 
and the apex, and bearing some extraordinary multifid setae on inner surface directed inwards. 
Measurements. Large species, body length about 16-18 mm, wing length about 15-17 mm. 
©. Generally similar to gj except that the abdomen is much more black and has the whitish 
pollinosity of the intermediate tergites much more conspicuous, purplish reflections less notice- 
able. Some pale yellow hair present on notopleural swellings and on extreme sides of scutum 
(below supra-alar setae). rons with one pair of well developed proclinate orbital setae. 
Vertex 0:23-0:25 of head-width. Size asingd. 
MATERIAL EXAMINED 
Holotype g, AUSTRALIA: Victoria, Monbulk. In British Museum (Natural 
History), London. 
Paratypes. AUSTRALIA: I g, 2 9, same data as holotype (one 9 with year date 
‘1895’ on label in addition to words ‘Monbulk Victoria’). 1 2, Victoria, Grampians, 
Reed’s Lookout, 23.xii.1953 (B. McMullan). All paratypes in British Museum 
(Natural History). 
DISTRIBUTION. Known only from south-eastern Australia. 
AFFINITIES. Closely allied to other species of Rutilia s.str. and perhaps most 
closely to R. (R.) setosa Macquart, from which it differs most notably in the key 
characters cited above. The genitalia, with their remarkable form of surstyli, are 
