64 
Records of the Australian Museum (2012) Vol. 64 
with brown apical zones, hind tibia with additional sub-basal 
brown zone; segment 3 of fore tarsus largely brown. Wing 
with slight brown markings as in H. bickeli etc. 
Head. Cheek 0.34-0.35 as high as eye. 
Thorax. Pteropleuron and hypopleuron without setulae; 
proepimeral bristle minute or absent. Legs and wing much 
as in H. bickeli. 
Abdomen. Sternite 1 almost completely desclerotized, 
without setulae. Male postabdomen: surstylus approximately 
transverse at basal articulation, shaped somewhat like 
that of H. subacuta but broader, more broadly truncate 
apically, with rather large posterobasal setulose tubercle 
(inconspicuous from some angles), numerous but not dense 
long setulae or mollisetae near middle of outer surface, 
and posterior sub-basal patch of microtrichia (Fig. 21). 
Female: postabdominal sclerites apparently as described 
for H. bickeli. 
Dimensions. Total length, $ 5.1-1.1 mm, $ 7.0-7.7 mm; 
length of thorax, 2.6-3.7 mm, $ 3.3-3.4 mm; length of 
wing, S 6.3-7.7 mm, $ 7.4 mm. 
Distribution. Tasmania: north-western districts, including 
elevations of c. 870 m or more. 
Notes 
Helosciomyza neboissi is most similar to H. subacuta, 
which it resembles in the absence of setulae on sternite 1, 
in coloration of the antenna, and in the usual absence of 
any brown zone on the anterior surface of the fore femur 
other than the subapical zone (but one specimen shows 
some brown suffusion on the more basal part of the anterior 
surface of both fore femora). It differs from H. subacuta in 
the characters indicated in the key and, in the male, in the 
broader surstylus with setulose basal tubercle. Also, the two 
species are perhaps geographically isolated as indicated by 
presently available data. 
The specific epithet refers to Arturs Neboiss, formerly of 
the Museum of Victoria, who first collected the species, and 
is remembered for his helpfulness and hospitality. 
Helosciomyza australica Steyskal 
Figs 20, 22 
Helosciomyza australica Steyskal, in Steyskal & Knutson, 
1979: 735, figs 14, 15, 25-27, 34-37; Barnes, 1981: 56, 
figs 11, 12. 
Type material (re-examined D.K.M.). Holotype S. New 
South Wales: Picton Lakes [Thirlmere Lakes], “Bred larva”, 
2.xi.l936, anon. (AM K264619). Cleared abdomen in micro- 
vial on same pin. Allotype $. Similar data to holotype, “#5”, 
8.xi.l936; puparium (also “#5”) in capsule on separate pin 
(AM). Paratypes. 2<$$, 3^$, similar data to holotype, 
apparent emergence dates l.xi.1936 and 2.xi.l936 (AM). 
Other material (identification confirmed D.K.M.). New South 
Wales: Careel Bay, Avalon ( Casuarina swamp, land now cleared 
and reclaimed), June 1962, D.K.M. (AM); \<$, Otford (area now a 
residential zone), Nov. 1962, D.K.M. (AM). 
Female specimens from more southern localities (whence no 
confirmatory males). New South Wales: Swan Lakes, near Sussex 
Inlet (AM); Tantawangalo Mountain, near Candelo (AM). Victoria: 
Mount Donna Buang, near summit, Warburton district (AM). 
Tasmania: near Russell Falls, Mount Field National Park (AM). 
Distribution. New South Wales: lowlands of Sydney district, 
between c. 33°39'S and 34°14'S. I have seen no specimens 
from the Sydney district collected after 1962. Possibly also 
more southern districts of New South Wales, Victoria, and 
Tasmania. 
Notes 
The male has the surstylus distinctively shaped and quite 
without pruinescence in the two specimens viewed under 
high magnification (Fig. 22), and a distinctive dense, non¬ 
linear cluster of short, thick black setulae ventrally at the 
base of the hind basitarsus, but no such diagnostic structures 
have been found in the female. Among the species with 
extensively infuscated antennal segment 3 and no setulae 
on the hypopleuron and abdominal sternite 1, H. australica 
differs from H. obliqua and H. macalpinei in having the fore 
femur entirely tawny-yellow on both anterior and posterior 
surfaces, except for the subapical brown mark, and fore- 
tarsal segment 3 is only slightly browned distally. These 
conditions alone may be inadequate as a reliable diagnostic 
indicator, especially as only females have been obtained in 
the apparent southern part of the species’ range, and there 
could be other somewhat similar undocumented species in 
these areas. These females generally show a slight apical 
browning of the palpus which may be decurrent along its 
ventral margin, but the type specimens and the two additional 
males are apparently too old and faded to show this condition 
distinctly. In H. subacuta, with similarly coloured fore femur 
to H. australica, the palpus is consistently pale yellow to the 
apex and antenna 3 has relatively little infuscation. The small 
proepimeral bristle may be present or absent in H. australica. 
Unfortunately the reared type specimens from Picton 
Lakes carry no information on larval habitat or habits. 
Helosciomyza steyskali n.sp. 
Figs 19, 23 
Helosciomyza ferruginea Hendel.-Steyskal & Knutson, 
1979:736 (in part, misidentifications; fig. 16 represents H. 
steyskali, fig. 2 apparently not); Barnes, 1981: 56-57 (in 
part, misidentifications; figs 13, 14 apply to H. steyskali', 
Queensland record probably applies to H. bickeli ). 
Type material. Holotype <$. New South Wales: Boyd River 
[Morong Creek] crossing, Kanangra-Boyd National Park 
[c. 1200 m], 2-4.iv.2002, B.J.D., D.K.M. (AM K264479). 
Double-mounted on micro-pin through polyporus, postab¬ 
domen in micro-vial on pin. Paratypes. New South Wales: 
1(3\ same data as holotype (AM); 1$, same locality, April 
2002, B.J.D. (AM); 1 km N of Boyd River bridge, 
Kanangra-Boyd National Park, Oct. 2005, D.K.M. (AM). 
Australian Capital Territory: 1$, Uriarra State Forest, Oct. 
1960, D.H.C. (ANIC); 2<SS, Blundell’s Farm, Jan. 1930, 
March 1930, L.F.G., I.M.M. (ANIC). 
Other material examined (localities only given). New South 
Wales: Alpine Creek, Snowy Mountains Highway (ANIC). Victoria: 
12 km SE of Merrijig, Mansfield district (MV); Mount Donna 
Buang, near summit (AM); Mulgrave, near Melbourne (MV); 
Cape Otway (MV). Tasmania: Flowerdale River, near Meunna 
(MV); Hellyer Gorge, Waratah Highway (AM); Lyell Highway, 
near Clarence River (ANIC); Mount Field National Park (AM). 
Because certainty of identification is difficult for females, 
only males are included in the type series. 
