198 



MKSOZOIC INSECTS OF QUEENSLAND, V., 



The preserved wing was almost certainly the fore wing of a 

 highly reduced type, which may very possibly have closely re- 

 sembled the recent Nannochoristidce in appearance. 



Type, Specimen No.218 (Coll. Queensland Geological Survey). 



Horizon: Upper Triassic, Ipswich, Q. 



Mecopteron incert^e sedis. (Text-tig. 24). 



Specimen No 168a, b, consists of two fragments of a small 

 Mecopterous wing, fairly well preserved, but not sufficiently 

 complete to merit a name. Text-fig.24 shows the venation of 

 these fragments. In the larger there are four forked veins, the 

 third and fourth being separated by a simple vein, while the 

 fourth is also followed by another simple vein. Hence it may 

 be suggested that the wing belongs to the Choristidce, the first 



Text-fig.24. 

 Two fragments (a, b) of Mecopterous wings from Upper Trias of Ipswich, 

 Q. ; Specimen No. lOSrt, b; ( x 13). 



two forked veins representing the branches of Rs (with R, Sc, 

 and the costal border indicated above them in order): while the 

 third and fourth forked veins, together with the simple vein 

 between them, and the simple vein posterior to the fouith, repre- 

 sent the six branches of the media. The positions of these veins, 

 and their angles of divergence from one another, agree closely 

 with those of other Choristidce, but the relative positions of the 



