736 PERMIAN AND TRIASSIC INSECTS FROM N.S.W., 



in the recent genera Chorista and 7'ceniocho isfa; in any case, it 

 is not at all likely that I have been able to discover by any means 

 all of the cross-veins actually existing in either specimen. 



Below Cui there is a nearl}^ parallel vein, giving off a posterior 

 branch which runs nearly parallel with it. As this appears to 

 be a somewhat weak vein, and there is a portion of a much 

 stronger vein running below it, I think that its upper branch 

 may prove to be Cug, the stronger vein being 1 A, which unites 

 with Cuo near the base by a weaker branch. If the basal stem 

 of this weak vein be continued proximad, it will run into the 

 bent basal end of Cu^ above it. This would agree very well 

 with the peculiar formation of Cii and lA basally in recent 

 Mecoptera, allowing for greater specialisation in this respect in 

 the recent forms. I have, therefore, marked tl.e straight, strong 

 vein, which fuses with M for a short distance near the base, Cuj, 

 and the upper branch of the weak, branched vein Cu^; but I do 

 not consider that the naming of these veins is placed beyond 

 doubt. 



The impression is a fairly good one, upon the smooth surface 

 of a chertyrock of a somewhat lighter colour than that on which 

 the former specimen is impressed; the main veins are also some- 

 what fainter. 



Type, Specimen No.26 in Coll. :SIitchell. 



Locality: Belmont Beds, at about the same level as the 

 previous specimen. 



Restoration of the Wing-Venation in thk Genus 

 Permochorista. (Text-tigs. 6-7). 



The preservation of the two wings, Permochoristd australica 

 and P. mitchelli, is sufficiently complete to enable us to restore 

 the venational type of the genus with very fair accuracy. To 

 do this, we must call to our aid the recent genus l^eniochorista, 

 which, as I have already indicated, is clearly a close ally, and 

 possibly even a direct descendant, of Permochorista. 



The venation of T. pallida Esb.-Pet., from Brisbane, is shown 

 in Text-fig. 7. It will be noticed at once that the forewing is 

 distinctly broader in the basal half than is the hindwing; also 



