102 R. W. CROSSKEY 
— Parafacials bare. Pleural regions of thorax with black hair. Abdomen very dark 
brownish black with indistinct median vitta. Abdominal chaetotaxy not 
unusually spiniform. Surstyli of g genitalia as in Text-fig. 86. [New South 
Wales] : 5 : : : : : 2 : 3 A. stolida 
Genus CHRYSOPASTA Brauer & Bergenstamm 
Chrysopasta Brauer & Bergenstamm, 1889 : 152. Type-species: Chrysopasta versicoloy Brauer 
& Bergenstamm, 1889 [=Rutilia elegans Macquart, 1846], by original designation and mono- 
typy. 
Roederia Brauer & Bergenstamm, 1893 : 98. Type-species: Chrysopasta versicoloy Brauer & 
Bergenstamm, 1889 [=Rutilia elegans Macquart, 1846], by monotypy (see text for explana- 
tion). [Junior homonym preoccupied by Roederia Mik, 1881}. 
Echrysopasta Townsend, 1932 : 39. Type-species: Rutilia elegans Macquart, 1846, by original 
designation. 
Euchrysopasta: Paramonov, 1968 : 372-373. Incorrect subsequent spelling of Echrysopasta 
Townsend, without status in nomenclature. 
Diacnosis. Facial carina with prominent bulbous upper part contracting ventrally to a 
sharp narrow ridge. Epistome very strongly prominent, subnasute, face in profile deeply 
concave between epistome and carina. Head of g not holoptic and upper eye facets not en- 
larged, frons much wider than facial carina. Parafacials densely long haired, hairing virtually 
continuous with that of genae. Buccal opening normal, much wider than facial carina in both 
sexes. Genal dilation strongly developed, extending forwards to or just beyond level of front 
of eye. Head pollinose anteriorly and on postorbits (pollinosity of lower parafrontals and 
postorbits with shifting chequered appearance), metallic on occipital and postbuccal regions. 
Arista micropubescent. Palpi medium size, much shorter than the unusually slender proboscis. 
Proboscis with slender mentum tapering slightly in profile towards labellae. Prosternum and 
prosternal membrane bare or haired (prosternum even strongly setose in some specimens). 
Scutellum with apical pair of setae inserted at lower level than other marginal setae; total of 
4-5 pairs of marginals; disc of scutellum convex. Postalar callus with three setae. Postalar 
wall bare. Suprasquamal ridge haired. Upper calypter normal. Tegula with normal long 
wiry posterior setulae. Costal base not explanate. Abdomen with marginal vestiture of 
tergite venters hairy only and semi-recumbent, no development of strong setae; T3 without 
median marginal setae in gf or at most with one pair, with one or two pairs in 9; intermediate 
tergites withoal discal setae (rarely T3 or T4 with one small stubby adventitious setula); T5 
truncate subconical without median depression, hypopygium of $ strongly prominent, surstyli 
as in Text-figs 91-94. 
DISTRIBUTION. Western Australia only. 
Discussion. At present this genus is monotypic, containing only Chrysopasta 
elegans (Macquart). It is possible, however, that this species as now understood 
might be a species complex (see later discussion). Townsend (1932, 1938) considered 
that elegans is generically distinct from versicolor Brauer & Bergenstamm (the type- 
species of Chrysopasta) and proposed the genus Echrysopasta for elegans, but I agree 
with Paramonov (1968 : 373) that elegans and versicolor are congeneric (though 
specific synonymy is less certain) and therefore that Echrysopasta is a synonym of 
Chrysopasta. (Paramonov cited Townsend’s name as Euchrysopasta, an incorrect 
subsequent spelling.) Comparison of the types (in British Museum (Natural His- 
tory)) of zabiyna Walker and elegans Macquart supports the synonymy of the 
former with the latter originally indicated by Malloch (1930 : 106) and recently 
