Dragonfly fi'om Nortliern Australia. 107 



apical, triangular spot directed towards the base of the seg- 

 ment ; 10 wliolly bronze-black ; sides of abdomen blue ; 

 abdomen beneath very pale, slightly bluisli. 



Anal appendages, viewed in proHle, well separated, nearly 

 equal in length, and not quite as long as segment 10 ; the 

 upper appendage subovate, pale, giving rise to a strong 

 black basal spur below, directed slightly backwards and 

 towards the lower appendage ; the lower appendage black, 

 simple, almost straight, subcylindical, and resting upon a pale 

 bulbous base. In dorsal view the superior appendages are 

 subconical and slightly divergent ; the inferior aj)pendages 

 are curved inwards, and a conspicuous pale tooth projects 

 inwards and backwards from the base of each. 



Austroagrion exclamationis, sp. n., type J . Left profile-view of 

 anal appendages. — H. Knight del, 



$ (allotype). 80 miles E. of Darwin, Northern Territory, 

 10. xii. 1914, G. F. Rill 



Length of abdomen 17*5 mm. ; length of hind wing 12 mm. 



Labium yellowish white. Labrum and genai yellowish. 

 Anteclypeus pale green. Postclypeus dark green. Frons 

 yellowish, marked with a lunulate black spot, as in male. 

 Head behind the antennse dull black, with a pair of rect- 

 angular yellow spots connecting the ocelli, as in male. 

 Postocular band narrow, greenish yellow. Basal joint of 

 antenna yellowish ; second joint blackish ; remainder 

 missing. 



Pronotum glossy black, bordered as in male, excepting 

 that the hind margin appears to be lined with light green 

 uninterruptedly ; tlie hind margin more distinctly trilobed 

 than in male. Sides of prothoiax pale green. 



Thorax pioper as in male. 



Legs as in male, but with the dark markings on femora 

 externally reduced and less intense. 



Pterostigma pale greenish yellow. Eight postnodals in 

 the fore wings and six or seven in the hind wings. M3 

 separating at the fourth postnodal in the fore wings, and 

 bttween the third and fourth postnodals in the hind wnigs. 



