BY R. J. TILLYARD. 193 



specimens by a beautiful silvery white bloom, which can be 

 rubbed off with the fingers. Underside dirty grey; 10 brownish. 

 Appendages — Superior very small, separated at bases, 

 slightly divergent, cylindrical, tips blunt; colour reddish-brown. 

 Inferior minute. (See Plate xviii., fig. 10a). 



9. Slightly larger than g, abdomen not quite so long. 



Wings as in g. but larger. Nodal Indicator |2 7| Last 

 postnodal of all four wings not continuous. |2 7j 



Head. — Epicranium and clypeus black. Labrum dark 

 brown; rest as in £. 



Thorax — Prothorax black. Meso- and metathorax black 

 above, sides dull green. Underside dirty grey. 



Abdomen cylindrical, thicker than in <£. Colour: dirty 

 black; 9, projecting below and ending in a small spike, pale 

 brown, tipped with black. 



Appendages separated, very short, black, somewhat 

 pointed; just below them is a small pale brown tubercle, on 

 segment 10. (See Plate xvii., fig. 106). 



Hab. — Kuranda, N.Q. January, 1905. Fairly common. 



This pretty little species inhabits the banks of small running 

 creeks, and is also often found in grassy places some distance 

 from water. It flies with its body dangling almost vertically 

 downwards, and has a pendulum-like motion, swaying from side 

 to side. When flying its wings are invisible, and it appears as 

 a bright silver streak, darting in and out of the grass. The Q * s 

 fond of hiding in the grass, and may be obtained by sweeping 

 but is more likely to be found in cop.; separate females of this 

 species could only with difficulty be recognised distinctively, 

 unless accompanied by the males. The £ is quite unlike any 

 other of the Australian members of the genus, and comes nearest 

 to A. exsmians Selys, of New Caledonia, a larger insect. 

 13 



