BY R. J. TILLYARt). 



253 



chance that they arose from the older Parana ecoptera will become 

 greater still. 



(vi.) Affinities frith the Mecoptera and Protomecqptera. 

 The affinities of the Paramecoptera with tliese two Orders are 

 clearly evident; but they are definitely collateral relationships, 

 not ancestral. For the MecojDtera already exist alongside the 

 Paramecoptera in the Belmont Beds; while the Triassic Proto- 

 mecoptera, being more archaic in many respects than the known 

 Mecoptera from Belmont, must also have existed in the Permian, 

 though not yet discovered there. 



Cu- 



Text-fig. 8. 

 Restoration of forewing in the genus Per-mochorista Tillyard ( x9), Order 

 Mecoptera. Upper Permian of Belmont, N.S.W. For lettering, see 

 Text-fig.2, p.238. 



All three Orders agree in having the original dichotomous 

 branchings of Bs and M,_ 4 preserved. Comparing Behnontia 

 with the forewing of Permochorista (Text-fig. 8) from the same 



