BY R. J. TILLYARD. 433 



Besides the locality where Martin's types of this species 

 were taken (Alexandra, Vic), I have found it in widely 

 separated localities, but it is never very common. It occurs 

 at several places near Sydney, viz.. Duck Creek, Aubiirn : 

 National Park and Lily Vale ; Ourimbah ; also at Atherton, 

 in North Queensland. It begins to appear just before the 

 i\ew \'ear, and is most likely to be met with during February 

 and March. It is a most retiring insect, being very fond of 

 resting on small shrubs, usually on some of the more central 

 twigs or branches. At intervals, it indulges in short flights, 

 which usually consist in balancing itself in the air in one 

 position, often in a confined space between the branches of 

 its shelter. When disturbed, it does not fly away, but flits 

 further into the bush, and settles in the foliage. 



18. IsosTiCTA BANKSi, u.sp. (Plate xlvii., fig. 4). 



cf. Total leiKjtlt, AA ; /ih(fo//irii, 36-5: /liiidiruKj, 22-5 mm. 



Wings hyaline: postnodaJti 13-15 on fore, 12-13 on hind- 

 wing; ■pto-ogffirjDut brownish, 1 mm. along costa, bvit with 

 upper distal angle very acute, so that the lower side is very 

 short, and covers only one cellule. (Plate xlvii., fig. 4.). 

 Head: epicranium dull black, rli/pcus shining black, lafi- 

 nim shining black, bordered along mouth with a pale straw- 

 coloured band : hihnini deeply cleft, pale straw colour. T h o- 

 rax: ■prothorax blackish, powdered with grey. Meso- and 

 ))i.rtathorax long and narrow, metallic greenish-black above, 

 with a jet-black dorsal line ; sides sliining black, edged and 

 touched here and there with grey pruinescence. In more 

 mature males, the whole thorax is slightly pruinescent, and 

 a pair of strongly pruinescent grey humeral bands appear. 

 Legs short, pale brown, with black stripes above on femora 

 and tibiae. Abdomen long and slender, very cylindrical, 

 1-2 scarcely enlarged at all, 7-10 very slightly so. Colour dark 

 metallic green, 1-2 with grey pruinescence above; 7-10 duller than 

 the rest; 3-6 with a tiny vale niai-k on each side close up to base. 

 Appendages: snjjerior 0-6 mm., black, forcipate, bases 

 thick ; seen from above, the tips are rounded, and there is 



