740 THE DRAGONFLIES OF SOUTH-AVESTERN AUSTRALIA, 



blue spots at bases of ocelli; in front a dull greenish-blue area 

 carrying a small black flattened T-mark, the base of vvhich pro- 

 ceeds from under the front ocellus. Postdypeus hairy, black; 

 antecJypeus blue; lahrum blue with a tiny black spot. Orbits 

 blue inwards, with a small black spot near the epicranium. 

 Labium pale dirty brown. Thorax: Prothorax black, a 

 narrow blue collar in front, a small blue spot on each side. 

 Meso- and metathorax brilliant blue, a broad metallic dorsal black 

 baud, and on each side a narrower lateral black band: some 

 black in the sublateral suture; underside dirty brown. Legs 

 blackish above, pale beneath. Abdomen : 1-2 slightly 

 enlarged, 7-10 swollen. Colour : 1, blue with a black basal spot; 

 2, brilliant blue, a large cup-shaped dorsal blotch of black, and 

 an anal black band in the suture: 3, basal three-fourths brilliant 

 blue, rest black, the black running up into a point along the 

 dorsum; -4-6, metallic bronzy-black, with a bright blue basal 

 band, which extends underneath along the sides nearly the whole 

 length of each segment; 7, basal three-fourths black, rest blue, 

 basal sutures blackish; 8-9 bright blue, blackish in the sutures; 

 10 black. Appendages: Superior very short, separated, 

 black, a stiff hair near the tips on the inner margin. Inferior 

 minute. 



9. Differs from the male as fellows : Head : Postocular baud 

 dull blue; other parts which are blue in male are grey in female. 

 Thorax as "in the male. Abdomen cylindrical, thicker than in 

 the male. Colour : 1, blue, with a dorsal black spot; 2, a large 

 irregular black dorsal patch; sides blue; 3-6, metallic bronzy- 

 black above, with blue sides and a narrow transverse basal blue 

 band; the black dorsal area is somewhat narrowed for four-fifths 

 of the segment, then slightly notched, and finally enlarged at the 

 anal end into a rounded patch covering all the dorsal portion and 

 a little of the lateral besides; 7, black above, blue on sides; a 

 transverse basal blue line; 8, black above, with a basal transverse 

 blue line; a blue line in the anal suture, and close up to it on 

 either side a small round blue spot; 9-10, black, sutures blue. 

 Underside greyish. Ovipositor carries two very short black 

 filaments. Appendages very short, wide apart, conical, black. 



