BY R. J. TILLYARD. 179 



Head. — Black epicranial band much thicker; sutures of 

 clypeus black; labrum jet black. 



Thorax marked with dark orange-brown, the black inter- 

 secting markings more extensive. 



Abdomen cylindrical, stouter than in <J; shining bronzy- 

 black; 2-5 with small brown basal spots. Laterally 8-10 appear 

 much enlarged, 8 ending below in an enormous brownish curved 

 spike over 2 mm. long; 9 carries a thick black spike with its 

 point curving upwards and carrying near the tip two short black 

 filaments, each ending in a minute hair pointing downwards. 

 (See Plate xvii , tig. lb). 



Appendages short, pointed, wide apart, black. 



Hab. — Kuranda, N.Q.; December, 1904; very rare. 



Only three specimens of this species have been' taken, one male 

 and two females. They were found flying about the thickly 

 wooded banks of one of the jungle creeks, very far from any 

 settlement. Their flight is weak and the}' are fond of clinging 

 to twigs, like Syulestes weyersi; or settling on rocks with out- 

 spread wings, like Argiolestes icteromelas. This latter habit is 

 contrary to the general habit of all other Agrionidce, which rest 

 with folded wings. This species has all its wings of the same 

 length, and very blunt and rounded at the tips, giving it a 

 somewhat peculiar appearance. It is easily distinguished from 

 the other two Australian species of the genus by its brilliant 

 orange thorax. 



2. Lestes tenuissimus, n.sp. 



<J. Total length, 47 mm.; abdomen, 38 mm.; wings, fore 24 mm., 

 hind 23 mm. 



Wings. — Neuration black; plerostigma 1*3 mm., fairly broad, 

 black. Nodal Indicator ||2 11-131 



||2 11-12) ' " 



Head. — Epicranium dull fuscous, shading to dull greyish- 

 blue near the eyes; ocelli black; antennas long, 2 - 5mm., black, 

 basal joint thickened; postclypeus dull fuscous; anteclypeus very 

 pale greenish-blue; labrum pale greenish-blue; labium and 

 mandibles pain dirty brownish, mouth edged with black. 



