Male:
AR about 2.55-2.86. Wing length about 2.4-3.36, width about 0.72 mm. VR abt 0.95-0.97. Legs pale, unbanded; BR 1.9-2.5.
Frontal tubercles present but very small, about 4-8 micron (not absent as stated by Martin & Cranston 1995). Palpal proportions 52 : 55 : 155 : 255 : 295. P5/P4 1.16-1.31; P5/P3 1.59-1.90. Clypeal setae abt 19-29.
Thoracic setae: abt 8-9 Acrostichal; 10-14 Dorsolateral; 5 Prealar; 3-5 anterior, 9-13 posterior (total 12-18) Scutellars. Setae on stem vein, abt 3.
Leg lengths (microns) and ratios as follows:
| Fe
| Ti
| Ta1
| Ta2
| Ta3
| Ta4
| Ta5
| LR
| F/T
| Ta5/Ti
|
PI
| 1185
| 960
| 1640
| 820
| 615
| 535
| 250
| 1.63-1.80
| 1.16-1.20
| 0.26-0.28
|
PII
| 1235
| 1100
| 655
| 360
| 280
| 180
| 120
| 0.58-0.61
| 1.03-1.17
|
|
PIII
| 1355
| 1345
| 975
| 565
| 405
| 235
| 155
| 0.72-0.73
| 0.99-1.03
|
|
Abdomen pale, with brown, broadly diamond shaped transverse area in basal half of tergites I-IV.
About 3-5 setae in a vaguely demarcated area on tergite IX. Anal point narrow but broadening at tip; Superior volsella closest to E(h)-type of Strenzke (1959); Inferior volsella, with simple setae, not reaching to tip of anal point - about proximal quarter of gonostylus, which is moderately broadened and narrows relatively gently over posterior third to half, 4+1 setae at tip.
Female:
Wing length: 3.07 (2.8-3.5) mm, 2 Scf on brachiolum, 16.25 (13-19) setae on squamal fringe; colour as male but abdomen less well marked than in male.
Head: frontal tubercles 10x7.5 (1.3 times longer than wide)(not absent as in original description); with 22+ temporal setae in a continuous multiserial row from inner verticals, 19-26 clypeal setae. Antenna with A5 400-420 µm, basal 4 flagellomeres each 156-158 µm long, A4 with neck 50% of length; AR 0.35-0.37. Palp segments (micron): 40 : 40-60 : 140-155 : 190-210 : 315-335, P5/P4 1.60-1.66; P5/P3 2.16-2.25.
Thoracic setae: abt. 11-17 Acrostichal; 4 linear Humeral; 21 Dorsocentral (27-28 incl. Humerals); 5-6 Prealars; 5 small in anterior row, 15 larger in posterior row (total 14-21) Scutellars.
Leg lengths (microns) and ratios as follows:
| Fe
| Ti
| Ta1
| Ta2
| Ta3
| Ta4
| Ta5
| LR
| F/T
| Ta4/Ti
|
PI
| 1305
| 1015
| 1660
| 820
| 590
| 520
| 250
| 1.64-1.65
| 1.22-1.36
| 0.54
|
PII
| 1293
| 1225
| 668
| 343
| 253
| 180
| 145
| 0.54-0.58
| 1.03-1.08
|
|
PIII
| 1435
| 1485
| 1035
| 585
| 450
| 265
| 165
| 0.68-0.71
| 0.97-0.98
|
|
LRs in the original description are Ti/Ta1. Sensilla chaetica: 50-60 on PII(Ti); 60-70 on PIII(Ti).
Genitalia typical for the genus, cercus with rounded outline and longer ventral margin.
Found: South Australia - Glen Osmond (Type locality) cultured in laboratory at Genetics Department, University of Melbourne. Types in Australian National Insect Collection.
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