428 MESOZOIC INSECTS OF QUEENSLAND, Hi., 



11 mm., which appear to represent tlie broken-off costal borders 

 of the other pair of wings. 



]Mr. Dunstan tells me that, in the search for this fossil, the 

 rock broke transversely across the two wings, leaving a consider- 

 able gap between them. On the other side of this break, Mr. 

 Dunstan prospected with his penknife, and was fortunate in 

 picking up a further (more distal) portion of the forewing, lying 

 exactly in line with the more basal portion. This part was 

 glued into position on gardboard with the rest of the fossil, as 

 shown in Text-fig. 14. Mr. Dunstan assures me that this part is 

 not, at the most, more than a sixteenth of an inch out. If that 

 be so, as it certainly would appear to be from the shape of the 

 w4ng, then it is clear that the wings of this insect were exces- 

 sively long and narrow-, being in shape not unlike the planes of 

 a modern aeroplane. This character suggested to me the name 

 of the genus. 



The general character of the wings of the fossil can be well 

 seen from Plate xliv., fig. 12. The hindwing is very complete as 

 regards its basal portion, and exhibits a large number of in- 

 teresting characters. We may most profitably study this wing- 

 first. 



The costal space appears to be strongly convex, and was pro- 

 bably formed of very hard chitin, since the few cross-veins in it 

 are indistinct, and the whole area appears to have been coriaceous 

 in texture. The convex curvature of this area ends posteriorly 

 in the deep groove of the subcosta, behind which the radius rises 

 strongly up again as a convex \ein. The two separate bases of 

 Pvs are both strongly marked \eins, but the base of the media 

 appears as a very weak vein diverging from R. The bases of Cu 

 and A are strong veins. 



In tlie whole of the basal region of the wing, up to a level 

 just beyond the second origin of Rs, the cross- veins are strongly 

 marked and easily followed. The meshwork here is of a typical 

 Paheodictyopterous type, the cells formed being very irregular in 

 shape. The development of the recurrent supplements between 

 M and Cu, and again between A and the posterior border, in the 



