226 Transactions. — Zoology. 



end. Fore wing with 11-14 post-nodal nervures. Labrura 

 olivaceous, edged with black ; upper parts of the head bronzy- 

 black. Prothorax black, with a dorsal touch of blue on each 

 of the three lobes ; front of the thorax bronzy-black, with a 

 blue ante-humeral band, becoming post-humeral and almost 

 forked in its upper part ; the black band which borders it is 

 sinuated on the outside, and prolonged above, under the 

 wings, to the middle suture of the sides ; the rest of the sides 

 olivaceous, passing into yellowish below, where the breast is 

 marked behind, on each side, with an elongated black spot. 

 Abdomen slender, bronzy-blue ; the 3rd to the 7th segment 

 with a bluish basal ring, passing into yellowish, which is the 

 colour of the lower surface. Legs yellowish-brown on the 

 outside, black on the inside in the male. Superior appendages 

 of the male like pincers, toothed outside, and having a tubercle 

 at the base inside, which is the commencement of a dilatation 

 terminated towards the middle by a very sharp tooth ; the end 

 inclined downwards, and curved slightly outwards. Inferior 

 appendages not half the length of the superior, brown, thick, 

 approximated, slightly attenuated. 



In the female the blue of the thorax is replaced by yellow, 

 and that of the abdomen by dull-bronze. The anal appendages 

 are separated, subcylindrical, yellowish, shorter than the last 

 segment ; the valves slightly toothed at the tips. Legs brown 

 inside. 



Locality. —Throughout New Zealand. 



Very common 



Genus Xanthageion, de Selys (1876). 



Head, thorax, and abdomen medium. The post-ocular 

 rays clear, united by an occipital line. Lower sector of the 

 triangle arising from the basal nervule of the post-costal ; 

 pterostigma lozenge-shaped, short on all the wings ; post- 

 nodal nervules 11 to 15. No spine on the vulva of the 

 female. 



Distribution. — Australia and New Zealand. 



The New Zealand species differ from those of Australia in 

 having the basal post-costal nervule placed between the first 

 and second ante-nodals instead of below the first. 



Artificial Key to the Specie.s. 



Pterostigma surmounting one cellule. 



Yellow spots behind the eyes and on the prothorax X. zealandicum. 



No yellow spots behind the eyes or on the prothorax X. antipodum. 



Pterostigma surmounting two cellules . . . . X. sobrinum. 



Xanthagrion zealandicum. 



Telebasis zealajidica, McLachlan, Ann. Mag. Nat. His., ser. 4, 

 vol. 12, p. 35 (1873) ; Trans. N.Z. Inst., vol. vi., App., 



