748 



PERMIAN AND TRIASSlC INSECTS FROM N.S.W.. 



on a hard, dark brown rock with rather uneven surface; the 

 main veins are beautifully preserved, and were evidently strongly 

 chitinised. 



It is not easy to determine whether this wing should be 

 placed in the Order Mecoptera or in the Trichoptera, which, in 

 Mesozoic times, were only just separated off from the older 

 Mecoptera, and closely resembled them in the venation of the 

 forewiug. But the following considerations have all weighed 

 wilh me in placing it in the older Order Mecoptera. 



(1). The presence of numerous cross- veins, many irregularly 

 placed in positions of no special advantage. (Probably there 

 were other cross- veins as well as those I have shown, but not 

 sufficiently well preserved to be visible). 



(2). The absence of the typical Tricljopterous wing-spot 

 between R4 and R5, not far from the origin of these two veins. 

 If this spot had been present, I think the wing is well enough 

 preserved for it to have shown up quite clearly. 



(3). The close resemblance in shape to the wing of Fmiorpod^s, 

 in the narrow base and well-rounded tip of the wing. 



Text-fig. 11. 

 Paiiorpode^ carol intn-ns Banks, hindwing. Recent; N. America. For 

 comparison with Mesopanorpa. The dotted cross-veins are almost 

 obsolete; pt, pterostigma. 



(4). The close resemblance between the venation of the fossil 

 and that of the hindiving of Panorpodes (Text-fig. 11). The only 

 important difference is that, in Panoiyodes, R4+5 sends three 

 veins to the apical border. Now, if the most posterior- of the.se 



