BY R. J. TILLYARD. 643 



as Erythemis rufa and Orthetrum villosovittatum in the pure 

 vermilion of its abdomen. A. allogenes has a narrower and duller 

 abdomen with the last three segments black, while L. festa is 

 brilliant red throughout. It, however, lacks the brilliant metallic 

 frontal spots possessed by A. allogenes. 



This insect occurs at Cairns and Cooktown both in winter and 

 summer. 



6. Agrionoptera regalis, n.sp. (Plate xiv., fig.3). 



^. Total length 48 mm.; abdomen 33 mm.; forewing 41 mm.; 

 hindwing 40 mm. 



Wings: neuration black, pterostigma black, 5 mm.; membra- 

 nule very small, brownish; triangle of forewing s with one cross- 

 nervule, followed by one row of three cells and then five rows of 

 two cells in the discoidal area, increasing afterwards to three 

 again; triangle of hindwing s free. Nodal Indicator 14 13-14 

 Head: occipital triangle very small, black; eyes 14 13-15 

 dark brown; vertex small, much tubercled, bifid, bright metallic 

 blue, the three ocelli arranged round it in a triangle; the central 

 ocellus large and conspicuous, and all three transparent, pale 

 yellowish; front wide above, low in front, somewhat cleft medially, 

 brilliant metallic blue, a dull yellowish-grey area low down on 

 each side; postclypeus pale yellow with a flap or fold on each 

 side overhanging the anteclypeus and carrying a small point; 

 anteclypeus and labrum pale yellow; labium and gence large, pale 

 rich brown; a large black central mark witlf a semicircular bar 

 on labium; mouth broadly edged with black. Thorax: Pro- 

 thorax hairy, very dark brown. Meso- and metathorax hairy in 

 front, very dark brown or almost black above, downy; a short 

 double yellowish line on dorsal ridge and a pair of indistinct 

 yellowish marks inside interalar ridge; sides greyish-black, crossed 

 by a broad longitudinal band of dull yellow, nearly in line with 

 the abdomen, somewhat irregular, and enclosing the conspicuous 

 meso-spiracle; notum black, scuta and scutella yellowish. Legs 

 black, procoxae and part of underside of profemora pale yellow, 

 tibiae with conspicuous stiff hairs or spines. Abdomen: 1-2 



