58 Re. Wi. CROSSKEY 
flat; frontal setae reduced or hair-like, rows reaching about to level of first antennal segment; 
antennae small or minute, third segment rounded apically and usually not longer than second 
segment, ends of antennae falling short of margin of oral cavity by a distance at least equal 
to length of third antennal segment and usually by a distance much greater than their own 
length; arista bare to short plumose; prosternal region inflated, prosternum and membrane 
bare; propleuron bare; propleural and prostigmatic setae often hair-like; humeral callus with 
two strong setae in most forms; mesonotal chaetotaxy varied, often much reduced (Text-fig. 55), 
normally 2 + 3 de setae and o + I or o + 2 ia setae (rarely a minute third post ia or no ia 
setae at all); pva seta small or very small, either one or two sa setae; usually two stp/ setae, 
sometimes only one; pteropleural seta absent or present (if present usually weak) ; infrasquamal 
hairs absent; scutellum usually with three pairs of marginal setae, the apicals usually crossed; 
fore coxa usually bare on much of inner anterior surface; mid tibia without submedian v seta 
or with a small v seta; hind coxae bare posterodorsally, not remote from abdomen; hind 
tibia with small pu apical seta and two dorsal preapicals; wing with second costal sector 
usually rather long and haired ventrally; costal margin sometimes (in New World forms only) 
with callus-like dilation between apices of R, and R,,, in g; cell R; open or closed; bend of 
vein M very sharp, usually about a right-angle, usually with short M, stump-like appendix; 
distance from bend of M to m-—cu shorter than or subequal to m—cu/y-m; upper surface of 
wing veins totally bare or with a few minute hairs only on basal node of R,,;; lower calypter 
broad, inner posterior angle close to scutellum; abdomen rotund, usually with much reduced 
chaetotaxy, often without any definite bristles; Tr + 2 excavate to hind margin; sutures 
of abdomen distinct; intermediate abdominal tergites always without discal setae; sternites 
widely exposed; 9 terminalia modified for deposition of planidia. 
In Australia the Ormiini were unknown until Paramonov (1955) described two 
species from Queensland and assigned them to the supposedly new genus Ovmiominda 
Paramonoy. In an earlier paper (Crosskey, 19660) it was shown that Ormiominda 
cannot be distinguished from the widespread Old World ormiine genus Therobia, 
and the opinion given earlier that Ovmiominda is a synonym of Therobia is here 
upheld as undoubtedly correct. Therobia is the only genus of the tribe yet known 
in Australia, but it is possible that Phasioormia Townsend occurs in north Queensland; 
the latter genus occurs from Burma to Papua and may ultimately be found in 
Australia (hence its inclusion in the key that follows). Finally it may be noted 
here that Paramonov’s species of Thervobia from Queensland seem rather doubtfully 
distinct, and it is also uncertain whether either or both are really separate species 
from T. braueri (Kertesz) from New Guinea, T. vesiculifera Bezzi from Fiji, or 
T. insularis Séguy from New Caledonia (some or all of which may well be synonymous 
with each other). 
Kery To AUSTRALIAN GENERA OF ORMIINI 
1 Epistome forming a long narrow strip running from the oral cavity to the antennal 
apices and flanked on each side by broad flattened and rather evenly haired 
facialia. No vibrissae. Antennae minute, length much less than a quarter of 
eye-height, apices separated from the oral cavity by a distance very much greater 
than their own length. Oral cavity extremely reduced and subcircular. Frons 
of 9 usually noticeably tapering towards the ventralend . .  THEROBIA Brauer 
— Epistome normal, without such form. Vibrissae distinct. Antennae not excep- 
tionally small, length greater than a quarter of eye-height, apices separated from 
oral cavity by a distance less than their own length. Oral cavity not exceptionally 
reduced, normally obviously longer than its width. Frons of 2 with parallel sides 
PHASIOORMIA Townsend 
