236 NEW FORMS OF AUSTRALIAN ODONATA, 



cases, the type-form from the northern limit (Kuranda) is the 

 darker, and at the southern limit (Mount Tambourine) a beauti- 

 fully spotted form occurs. 



6. Diphlebia hybridoides Tillyard. 



The male of this species was described by me, These Proceedings, 

 1911, xxxvi., p. 587. 



Q (unique). Total length 52, abdomen 39, forewing 38, hind- 

 wing 36 - 5 mm. Wings: neuration black, the whole wing 

 slightly shaded with brown ; pterostigma 3 mm., dark brown. 



Nodal Indicator 

 three small brown 



6-7, 24-25L Head: epicranium black, with 

 5-6, 20 marks near ocelli; clypeus jet black; 

 labrum black, with two brown spots; gence and inside of orbits 

 yellowish-brown; labium pale dirty-brownish. Thorax: pro- 

 thorax black, with two reddish-brown touches, and a little brown 

 on posterior border. Meso- and metathorax very dark brown, 

 with black dorsal and humeral bands; lower part of sides and 

 underside powdered with grey. Legs black, undersides of femora 

 powdered with grey. Abdomen: 1-7 quite cylindrical, 8-10 

 somewhat clubbed. Colour jet-black; sides of 1 and underside 

 of 2-8 slightly powdered with grey. Appendages 1 mm., sharply 

 pointed, black. 



( J. It is necessary to add, to the already published description, 

 the colouration of the thorax and abdomen, since the type-specimen 

 was discoloured. Thorax: prothorax black, with two small 

 brown spots well forward, two large central brown spots, and a 

 short transverse brown mark behind. Meso- and metathorax rich 

 brown (not blue as in other species), with black dorsal and 

 humeral bands ; sides brownish, shading to dull bluish below, a nar- 

 row sublateral black band in suture. Abdomen: 1 brownish, 

 with a rectangular basal black blotch; 2-9 as described; 10 black; 

 appendages black. 



Note: — This species must not be confounded with the black- 

 tipped form of D. lesto'ides Selys. In Victoria and the southern 

 half of New South Wales, D. lesto'ides £ has a milky bar across 

 the wings, but the tips are quite clear. In the northern half of New 



