BY R. J. TILLYARD. 725 



long, 7 mm., rose-red, strongly braced. Membranule, fore 2 mm., 

 very wide; hind 9 mm., wide and curved at base, then becoming 

 very narrow; colour dull whitish. Nodal Indicator 129-31 25-27i 

 Head: Vertex tubercled, hairy, brown; antennae 1123-25 26-27! 

 3 5 mm., brown, basal joint thickened; eyes meeting for a 

 distance of 5 mm., dark brown. Front large, hairy, pale brownish, 

 projecting forwards and pointed in the form of an anvil (compare 

 Telephlebia Godeffroyi). Glypeus : postclypeus vertical, high; 

 anteclypeus compressed, narrow, pale yellowish-brown. Labrum 

 wide, massive, pale yellowish-brown; labium cinnamon-brown, 

 mandibles brown. Thorax: Prothorax small, pale yellowish- 

 brown. Meso- and metathorax short, broad, dark brown; dorsal 

 ridge high and strongly marked, rising to an obtuse-angled point; 

 on each side a pale whitish humeral ray; below, a parallel equal 

 ray of the same colour; both rays slightly irregular. Legs dark 

 brown, tibiae with strong bristles. Abdomen cylindrical, 1-2 

 slightly swollen, 8-10 somewhat enlarged below; colour dark 

 chocolate-brown, markings, if any, obliterated ; 10 enlarged 

 beneath into a projection ending in a semicircular 8-denticulate 

 plate, reaching just beyond the appendages. Underside dark 

 brown. Spur of ovipositor huge, reaching to end of abdomen 

 (see Plate lxviii., figs. 2a-2b). Appendages nearly as long 

 as 10, narrow, subcylindrical, pointed, wide apart, separated by 

 the upper projection of 10; dark brown. 



Bab.— New South Wales (circa 1870). 



The unique specimen described above is in the Australian 

 Museum, Sydney. It is an old and discoloured specimen, 

 and must have been put away for many long years, nobody 

 knowing what a prize it was. It carries a label marked N. S.W., 

 but this indeed would be insufficient evidence on which to base 

 its claim to be an Australian insect, were it not for the fact that 

 it belongs to a group of subgenera which are known to be 

 exclusively Australian, viz., Austroaesclma, Acanthaeschna, and 

 Planaeschna. As to which of these genera it in reality belongs, 

 it is impossible to say because the male is unknown. The 

 markings on the thorax being straight bands, it should probably 



