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



cheitv rock. Ail the main veins are outlined to perfection, but 

 the cross- veins are mostly only to be made out very indistinctly, 

 in strong oblique light. A few cross-veins are somewhat more 

 distinct; such as, for instance, the strong cross- vein passing from 

 M4, just distally from its origin, to Cuj, and causing a distinct 

 bend in the former vein, and also the cross- vein descending from 

 close up to the bifurcation of H2+3upon R^ The feeble develop- 

 metjt of the cioss-veins in such an excellently preserved wing 

 proves them to have been at the stage seen in the recent genus 

 Tfeniochorista — Si stage preliminary to the complete elimination 

 of all except a very few advantageously placed cross-veins, such 

 as we find in the derived Orders Trichoptera, Lepidoptera, and 

 Diptera. 



As far as can be gathered from this impression, the wing was 

 quite smooth except in the pterostigmatic region, which appears 

 to have been either granulate, or beset with rather crowded 

 macrotrichia. The main veins probably carried macrotrichia of 

 rather small size, and closely set together; in some places, as, 

 for instance, on the stem of Pvs, there are indications that the 

 macrotrichia were arranged in two rows close together. But 

 the grain of the rock prevents us from determining this point 

 with certainty. Microtrichia may, or may not, have been pre- 

 sent, as the grain of the rock is not fine enough to show them in 

 any case. 



Type, Specimen No.24 in Coll. Mitchell. 



Locality: Belmont Beds, at a depth of about 600 feet 

 below the top of the Permian Coal-Measures. 



Permochorista mitchelli, n.sp. (Text-fig.5). 

 A fragment comprising about two-thirds of a complete wing, 

 with a considerable part of the apical area missing,, but the base 

 and costa more complete than in the previous specimen. Total 

 length of the fragment 7-5 mm.; this indicates a somewhat 

 larger, and certainly a distinctly broader wing than that of 

 P. anstralica. The end of Sc, with three cross-veins running 

 to the costa above it, is very clearly marked: likewise the ptero- 

 stigma, with signs of three cross-veins within its distal half, and 



