232 



STUDIES IN AUSTRALIAN NEUROPTERA, iii., 



the hindwing. 'I'he supposed media and cubitus prove to be two 

 excessively complex veins peculiar to the Chrysopidc^. The 

 original media and cubitus of this extraordinary wing-venation 

 have become reduced and contorted, so that their courses could 

 not even he guessed at without reference to the pupal trachea- 

 tion. The two new complex veins do indeed more or less fill 



Text-fig.5. — Tracheation of wings of pupa of C. siffnata Walk.,( x 54). For 

 lettering, see Explanation of Plate x. (Camera-lucida drawing from 

 freshly-killed pupa). 



the places usually occupied by the media and cubitus in un- 

 specialised Neuropterous wings. Therefore, as it is quite impos- 

 sible to give to these veins the complex names that would indi- 

 cate their true nature, I propose to name them at once the 

 pseudo-media and the pseudo-cuhitus respectively, in order to 

 facilitate discussion, and to distinguish them clearly from the 

 true media and cubitus. I suggest also the notation M' for the 

 pseudo-media, and Cu' for the pseudo-cubitus, as shown in 

 Plate X. 



In order to trace the courses of the true media and cubitus, 

 and to understand how the pseudo-media and pseudo-cubitus 

 have supplanted them in the Chrysopid wing, let us turn now 

 to the study of the pupal tracheation, as shown in Text-fig.5 and 



