584 MESOZOIC INSECTS OF QUEENSLAND, iv., 



fully rounded. Node exceediDgly prominent. Rj a weak vein 

 fused with costal margin from below node up to about one-tbird 

 the length of the membrane. Kg ending well before the apex, 

 R3 at tlie apex itself. Between K and M, at the base of the 

 membrane, a closed cell is formed, bounded by the dividing line 

 basally, by R..^ anteriorly, by Mj posteriorly, and by a short 

 cross-vein connecting these two veins distally. Distally from 

 this cell a second closed cell is formed between R^ and R5, these 

 two veins at first diverging, and then converging to meet again 

 at a point beyond the middle of the membrane. M, and M.^ 

 united distally for a short distance upon the membrane. The 

 backwardly projecting branch from M3 comes off almost at right 

 angles from the main stem. (Rest of hemelytron missing). 



Genotype, Dunstania pulchra Till., (3, p. 32, and Plate iii., 

 fig. 6). 



Genus D u N s t a x i o p s i s, n.g. (Text-fig. 18). 



Hemelytron completely preserved except for the extreme l)ase 

 of the corium (including the clavus, if present) and the apical 

 portion of the membrane. A longer wing than that of Dun- 

 stania^ and narrower in proportion. Differs from Dunstania as 

 follows: — Corium smooth, membrane lightly pitted all over. 

 Coriaceous border narrower and less defined; node somewhat less 

 prominent. R4-1-5 a single straight vein, and hence no closed 

 cell formed between R4 and R5. The basal cell completed by 

 the presence of the short cross vein betw^een M^ and lowest 

 branch of R is present, but is much shorter than in Dunstania. 

 The backwardly projecting branch from M3 to the junction of 

 Mj and Cuj^^ comes off from the main stem at an angle of about 

 30^, and runs almost parallel to the posterior border below it. 

 On the corium, M curves upward distally, converging towards 

 R, and giving off posteriorly two branches which unite further 

 distad and then meet an anterior branch given off from Cu; this 

 latter vein divides at the dividing line into three branches, CU)^, 

 Cujb, and Cun, of which the first runs to the intersection of M4 

 and the backward branch fi (jm M3. Cu^, ends up at or near the 

 tornus. 



Genotype, Duiiatniiioijsis triassica^ n.sp. 



