246 



STUDIES IN AUSTRALIAN NEUROPTERA, iii., 



stufenformigen Queradern zwischen den Aesten des Sector. Die 

 Medialis ist noch urspriinglicher als bei den Chrysopiden, bei 

 welchen sie in fast gerader Richtung iiber die Fliigelmitte hinaus 

 fortgesetzt und von einer langeren Reihe viereckiger Zellen 

 begleitet ist." It seems clear, therefore, that Handlirsch, if he 

 had known the true structure of the media in Chrysopa, would 

 have placed this form considerably closer to the Chrysopidce than 

 he did. 



Text-fig.8. — Wing of Mesochrysopa zitteli Meunier,( x 2). Lithographic 

 chalk, Bavaria. Upper Jurassic. (Adapted from Handlirsch). 

 In Text-fig.8, I have copied Handlirsch's figure of this inter- 

 esting fossil, and have added to it my own interpretation of the 

 venation. Also, as the wing was figui-ed with the apex to the 

 left, I have reversed it, to facilitate comparison with my other 

 figures. There are evidently twelve branches descending from 

 Rs; these are labelled Sj to Sj.^. The limits of M, Cu, and the 

 three anal veins are clear enough proximally (though the ex- 

 treme base of the wing is lost), but the actual distal endings are 

 slightly in doubt. What is cleai-, however, is that both M and 

 Cu are two-branched, and of just about the shape and size pos- 

 tulated in our hypothetical Chrysopid ancestor. Further, the 

 more proximally placed cross-veins between the branches of Rs 

 have begun to arrange themselves into two continuous series, 

 upon which I have placed the labels M' and Cu' respectively, 

 since I consider them to represent the primitive formation of 

 pseudo media -H inner gradate series for the upper set, and pseudo- 

 cubitus + outer gradate series for the lower set respectively. 

 They are still very irregular, and one cross-vein appears to be 



