BY R. J. TILL YARD. 



743 



that of the numerous branches following it distally along Cu. 

 Thus, in the hindwing, Cuj is the analogue in form and position 

 of Cuj + M2 in the forewing. 



We may summarise our results as follows: — 

 Tablk of Mykmklkomd Venation. 



Phylogenetic Conclusions. 



The phylogenetic results deducible from this new discovery 

 are of considerable interest and importance. So far, it has not 

 been possible to indicate with any certainty the origin of the 

 dominant group, MyrmeleonidcE. There has been a general agree- 

 ment in looking upon the Nyrtiphidce^ a small family confined to 

 Australia, as representing the probable type from which the 

 Myrmpleonidce have been developed. But this agreement is not, 

 so far as I can ascertain, based on any definite evidence, but 

 merely on a general impression of the Myrmeleonid-like appear- 

 ance of the well-known Nymphes myvmeleonides Leach. We now 

 have definite venational evidence to go upon, and we may say 

 at once that it fully establishes the claim of the Nymphidce to be 

 regarded as the remains of the ancestral group from which the 

 Myrmeleoiiid(e have sprung. 



In the Nymphidce (except in the case of the aberrant reduced 

 genus Austronyinphes) the median vein is forked in the foretving, 



