Eugowra uniseta, Daniel J Bickel, 2006

Daniel J Bickel, 2006, Eugowra, A New Fly Genus from Australia (Empididae: Empidinae), Records of the Australian Museum 58, pp. 119-124 : 122

Eugowra uniseta n.sp.

Type material. HOLOTYPE 3 ANIC, PARATYPES 733 , 5♀♀, all New South Wales, 2.4 km NE of Eugowra , 24.iv.1971, Z. Liepa ( ANIC).

Additional material. New South Wales: 333, 4♀♀, Conargo, Billabong Ck., 23–30.iv.1978 ; 1♀ Gerogery, 14.vi.1961. Victoria: 13, 2♀♀, 7 km W of Dimboola , 8.viii.1968 ( ANIC) .

Description. Male length: 3.0–3.1; wing: 3.3× 1.2. Head ( Fig. 1a); frons and face dark brown and covered with uniform grey pruinosity; black pruinosity on ocellar triangle, ending as triangle on dorsal postcranium, and as stripe along lateral frons; face with pair pale setae between antennal base and clypeal margin. Thorax dark brown with grey pruinosity; thoracic setae yellow; ac comprising band 3–4 setae wide extending to anterior margin of posterior slope; dc as row of pale setae, with 5 longer setae along posterior mesonotal slope, and 15 setae anteriad; field of short pale seta present from mesonotal suture to humeral callus. Legs CI mostly yellow but infuscated basally; CII and CIII mostly brown with grey pruinosity, but yellow distally; femora and tibia are mostly yellow (some specimens with tibiae infuscated); tarsomeres dark brown; coxae with pale setae; I: 3.7; 3.2; 1.8/ 0.7/ 0.4/ 0.3/ 0.5; TI ( Fig. 1b) with single strong black dorsal setae at 7 ⁄ 8 (MSSC); It 1 swollen with some short distal setae; II: 3.5; 3.7; 1.2/ 0.4/ 0.3/ 0.2/ 0.5; TII with pale dorsal and ventral setae, and stronger pale dorsal seta at 7 ⁄ 8; III: 4.5; 4.7; 1.5/ 0.5/ 0.4/ 0.3/ 0.5; FIII with row of pale av and pv setae, becoming longer and slightly curved towards apex; TIII with pale dorsal and ventral setae, with strong subapical dorsal seta. Wing hyaline, without infuscation; stigma faint yellow; lower calypter yellow with pale setae; halter yellow with brownish club. Abdomen mostly brown with pale vestiture; setae longer along posterior margins of each tergum; hypopygium ( Fig. 1c) mostly brown; median basal projection of hypandrium needle-like.

Female: similar to male except as noted: tibia I lacks strong dorsal seta at 7 ⁄ 8; female also with pair of setae on face between antennae and clypeal margin.

Remarks. Eugowra uniseta is distinguished from congeners by the single strong subapical dorsal seta on tibia I and the paler colouration, the legs being more yellow, and the wing hyaline, not smoky. This species is apparently widespread in the Murray River drainage of southern New South Wales and western Victoria. All specimens were collected in cool months, late April to July. Both sexes have a pair of short pale setae between the antennal base and clypeal margin.