690 MESOZOIC INSECTS OF QUEENSLAND, il , 



within the hroad definition of that family, true .EschuidfB. I 

 propose, therefore, to regard Handhrsch's family .Eschnidiidce as 

 only a subfamily, ^Eschuidiinxp, within the family ^Eschnidce, and 

 of equivalent rank with the subfamilies Petalui'itup, Cordide- 

 (jastrince, and C hloroywuqyhince. This last group, I consider to 

 be the nearest living type to the fossil ' ^Eschnidiince^ owing to 

 the shape of its triangles. 



At present, the fossil wings (Jurassic and Cretaceous) assigned 

 to the subfamily uEschtiidihue are all comprised within the single 

 genus ^Eschnidiuni AVestwood. I now propose to separate out 

 the Queensland fossil wing as the type of a distinct, new genus, 

 ^Eschnidiopsisy according to the following Table: — 



Subfamily ^schnidiin^. 

 Key to the Genera. 

 Arcuhis complete posteriorly; triangles not excessively narrowed 



transversely to the wing-axis Genus ^Eschnidium Westwood. 



(Jurassic, Europe). Type, Jj^schnidium huhas Westwood. (Lower 

 Purbecks, Durdlestone Bay, England). 

 Arculus incomplete posteriorly; triangle of hindwing excessively 



narrowed and elongated transversely to the wing-axis 



Genus jEschnidiopsi^, n.g. 



(Cretaceous, Australia). Type, ^Eschna Jiindersitnsis Woodward. 

 (Flinders River Beds, N. Queensland). 



^SCHNIDIOPSIS, n.g. 



Large Dragonflies (hindwing about 40 mm. long) with exceed- 

 ingly dense reticulation, as in uEschnidium. Nodtis completely 

 formed, but weak; subnodus also present. Rs arises at the sub- 

 nodus, crosses Mj and M.^ just distad from their point of union, 

 and drops towards Ms as an incomplete, oblique vein. (In 

 jEschnidiuni, as figured by Handlirsch, the oblique vein is com- 

 plete in the hindwing, and lies far distad from the nodus). 

 , Arculus strongly formed, but incomplete posteriorly; M1+3 leav- 

 ing it very close up to R; M4 lying well below M1+3, separated 

 from the latter by two rows of cellules. Triangle of hindwing 

 very long, and excessively narrowed transversely to the wing- 

 axis; crossed by a number of simple, subparallel cross-veins; 



