BY ft. J. TILLY ARD. 583 



Veins present on the coriiim are R, M, and Cii; no clavus visible 

 in the preserved portion, but the base of the wing is incomplete 

 posteriorly in all known specimens. 8c fused with costal margin. 

 Costa broken between corium and membrane by a strongly de- 

 veloped node. Dividing line between corium and membrane 

 crosses the wing from node to antinode in a very irregular 

 manner, being formed anteriorly by short cross-veins and por- 

 tions of main veins, posteriorly by a sinuous line not made up 

 of veins. On the membrane there are either eight or nine 

 longitudinal veins, of which either three or four arise from R, 

 three from M, and two from Cu; these veins runs distad in a 

 slightly diverging manner, Rg ending up at or near the apex, and 

 Cui at or near the torn us. From M3 a downward and back- 

 wardly running branch passes to the dividing line, where it 

 meets the intersection of M4 and Cui^. Few cross-veins present 

 on membrane. Veins of the membrane pale, generally bordered 

 on either side by a band of dark brown pigment. A fairly broad 

 border without pits, and probably coriaceous, runs completely 

 round the membrane. 



Horizon, Upper Trias of Ipswich, Queensland. 



The genera comprised in this family are Danstania Till., 

 Dunstaniopsis, n.g., and Fai^adunatania, n.g. 



Key to the known genera of Dunstaniidc'. 

 f'S] 1 connected with the lowest branch of R by a short cross- 



I vein, not far distad from the dividing line 1 . 



I No cross-vein present at this level between Mi and lowest 



I Ijrancli of R PavoAlunstania, n.g. 



I ''Four branches of R crossing the membrane, viz., Rn to R5 ; R4 

 and R5 unite a little beyond half-way, forming a closed cell 

 Dunstania Till . 



Tluee branches of R crossing the membrane, viz, Ro, R.t, and 

 R4+5; the last a single straight vein connected with M, near 



its origin Dunstaniopsis, n. g. 



Genus Dunstania Tillyard. 

 (Plate lix., fig.15, and Text-fig.l9). 

 Membrane and a very small portion only of the corium pre- 

 served. Preserved portion of corium distinctly pitted all over. 

 Membrane about as broad as long, the apex prominent but grace- 



