Odonata from New Caledonia. 39 



segments are mainly yellowish, with black at apex, while 

 most of the posterior segments are mainly blackish. 



Anal appendages ((ig. 1) longer than segment 10, but 



IsosticfAt tillyardi, sp. n., J, holotvpe. Anal appenclao:e.s, in left profile 

 view. Figs. 1-11, camera-lucida drawings by P. Highley. 



shorter than segment 9 ; the superior pair, in dorsal view, 

 curved and convergent, broad at base, bluntly pointed at 

 apex. Tn profile view, very broad throughout, slightly 

 constricted near the middle, the inferior apical angle with 

 •a large ovate process : a large triangular tooth, apparently 

 medio-basal in position, projecting ventrally : the inferior 

 pair little, if at all, longer than the superior ones. In ventral 

 view, expanded horizontally in the basal half, narrow in the 

 apical half, and ending in an inwardly-directed hook. 



1 ? (allotype), Mt. Canala, 12. vi, 14. 



Length of abdomen 32 mm. ; hind wing 23*5 mm. 



Black, with a low metallic glaze. Clypeus metallic black ; 

 anterior margin of frons with a broad border of bright 

 yellow, interrupted in the middle ; the second and third 

 joints of antennae yellowish. Head otherwise as in ^ . 



Hind margin of prothorax (fig. 3) not elevated, deeply trifid; 

 the median division quadrangular ; the lateral divisions 

 rounded. ]\[eso-metathorax : humeral suture lined with 

 yellow ; the whole of the metepimeron and most of the 

 metepisternum yellow ; inferior surface wholly yellows 



Wnigs as in S ^ except that Mg arises at (fore wings) or a 

 trifle before (hind wings) the subuodus, and Cu^ invades the 

 third cell beyond the quadrangle. Postnodals J^^. 



Legs largely yellowish; external surface of femora mainly 



