BT R. J. TILLYABD. 



415 



curved, ending up a little before apex. Rs arising at about one-fourth from 

 base as a strongly built vein diverging gradually from Ki and remaining un- 

 brauclied until about one-fourth from apex; it then gives off an anterior branch, 

 E2+3, which runs obliquely upwards to join Ri, while the main portion R4+5, 

 runs straight on for a short distance and then forks into R4 and Rr„ which end 

 up just above and below the apex respectively. M arises from R close to base 

 and nins obliquely across the wing, sub-parallel to Rs; it remains simple to 

 half-way, when it forks into Mi +2 and M3+4, the former again forking into 

 Ml and M2, the latter remaining unforked. Cui a very strong vein running 

 obliquely and slightly divergingly below M to about one-third from base, where 

 it forks into Cui„ and Cuii,, the fonner of which is again forked. Cu2 only 

 just indicated as a weak furrow vein. Anal area (possibly partly overfolded) 

 witli ]A and 2A present; lA straight and simple, '2A waved. 



Text-fig. 1. A/itc/ielloneiira perviiaiia,n.g. et sp. Hindwing. (x 6.7) 



lA, 2A, anal veins; Cm, first cubitus, with its branches Cuia and Cuib; Cu2, second 



cubitus; M, media, with its branches Mi, M2 and M3-1-4 ; Rf, main stem of radius ; Es, 



radial sector, with its branches Ei-i-,;, R4 and E5; Sc, subcosta. 



Genotype, Mitclielloneura permiana, n. sp. 



Horizon, Upper Permian of Newcastle, N.S.W. 



The generic name is given as a dedication to the discoverer of the New- 

 castle and Belmont fossil insects, Mr. John Mitchell. 



Affinities: The short Sc, fused with R, the manner of branching of 

 Rs and M, and especially the forked Cuia, indicate the Hemipterous nature of 

 this remarkable fossil. The only known wing with which it seems to have any 

 close affinity is that of Prosbole hirsuta Koken (Text-fig. 2) from the Upper 

 Permian of the Kama River, Russia. This fossil is a forewing. The differences 

 between it and Mitch elloneura are of the kind one wouhl expect in comparing 

 fiire and hind wings of two fairly closely related insects. For example, Prosbole 

 shows a definite beginning of tlie di^dsion of the wing into cormm and membrane, 

 as seen in most of the Heteroptera, and the corium is strongly tuberculated. In 

 conjunction with this, it will be seen that a definite node is present just beyond 



