56 
Records of the Australian Museum (2012) Vol. 64 
Figures 11, 12. (11) Luta luteipennis, part of thorax showing right postalar callus. (12) Huttonina abrupta Tonnoir & Malloch, part of 
thorax showing right postalar region. Postalar bristle indicated. 
McAlpine, 1991b) differences between the Helosciomyzidae 
and Heterocheilidae. 
The Helosciomyzidae, in contrast to the Dryomyzidae, 
are restricted to the Southern Hemisphere. The majority of 
the 27 or 28 known species live in the temperate zone, but 
in both Australia and South America one species is recorded 
for the tropics. Of the 15 known Australian species, only 
two widely distributed species are recorded for Queensland, 
whereas at least eight species live in Tasmania, four of them 
possibly endemic to the state. Eleven species are recorded 
for New Zealand (Barnes, 1981), but it is uncertain if one 
of these is the same as an Australian species. 
Key to Australian genera of Helosciomyzidae 
1 Dorsocentral bristles four large pairs; costa near mid-length with 
spaced dorsal spines in addition to anterior ones; male: surstylus 
without posterobasal foot, with simple almost horizontal basal 
articulation with lateral margin of epandrium, and much removed 
from base of cercus posteriorly. Eurotocus, p. 57 
-Dorsocentral bristles usually two large pairs; costa with an 
anterior series of spaced spines only; male: surstylus with broad 
or narrow posterobasal foot, articulating with posterior margin of 
epandrium, and approaching base of cercus . 2 
2 Anterior bristle of hind femur absent, at least in male, small if 
present in female; sternopleuron on upper half or more with 
very generally distributed numerous fine hairs, sometimes 
forming long mollisetae in males; mesopleuron densely greyish 
pruinescent, without tawny orange zone; subapical anterior bristle 
of hind tibia absent or much smaller and thinner than preapical 
dorsal bristle (Figs 1,3) . 
-Anterior bristle of hind femur large (sometimes duplicated); 
sternopleuron on upper part usually with narrower oblique tract of 
hairs, leaving bare anterodorsal and posterior zones; mesopleuron 
generally with tawny orange zone on mid or upper part; subapical 
anterior bristle of hind tibia present, about as stout as preapical 
dorsal bristle, though shorter (Fig. 2) . 
3 Scutellum concave mid-dorsally; antennal segment 3 short, sub- 
circular; antennal segment 5 (preapical segment of arista) rounded, 
not much longer than its maximum diameter; male: hind basitarsus 
without scopula, with dense ventral setulae. Cobergius, p. 69 
-Scutellum convex dorsally; antennal segment 3 rounded oval, 
markedly longer than deep; antennal segment 5 cylindrical, c. twice 
as long as its diameter; male: hind basitarsus with dense ventral 
scopula for almost whole length (Fig. 9) . Neosciomyza, p. 68 
4 Halter with brown capitellum; antennal segment 2 black (dark 
brown in faded specimens); height of cheek not more than 0.25 of 
height of eye; wing membrane deep yellow; male postabdomen: 
3 
