418 



TWO FOSSIL INSECT WINGS IN C»LLECTION OF MR. JOHN MITCHELL, 



where the high ridge ceases, Cui sends off a short branch, Cuu, directly to the 

 wing-margin below it, while the main part, Cui„ beeome.s a weak vein, forming 

 a well defined arch upwards beneath the fork of M, and then curving down to 

 end up on the posterior margin at the same level as the end of Ri on the costa. 

 In the narrow space lietween Cui and the posterior border, there lies a short, 

 concave vein arising basally below R; this is probably Cu2 -|- lA, fused together. 

 There are no daval \eins present, the time clavus being reduced to the very 

 narrow strip lying between this last vein and the posterior border. 



The membrane of the wing is evidently very tough, its impression com- 

 pletely obliterating that of the frond beneath it; there is an appearance of a 

 very fine granulation all over it. (Plate sxxv., fig. 2). 



Genotype, Lophioneura nxttdata. n.sp. 



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



the generic name wa.s suggested by the strongly formed ridges of the veins 

 R and Cm. (Greek AncjbtJ = a ridge). 



++S 



Text-fig. 3. Lophioneiira usiulata,n.'^. cts\y. Porewinp;. (x 16.7). 



Text-flg. 4. Forewing of a large undoscribed species of Psyllid from New Zealand, 



(expanse about 10 lum.). 



For venational notation, see Text-fig. 1 above. 



Affinities: In the complete fusion of the ba.sal portions of M and Cui 

 with R, coupled with the small size, excessively simplified venational scheme 

 and the very evident thickening of the costal margin from Ri almost to apex, 

 the forewing of LophuDiettra shows very definite Sternorrhynchous charaetei-s, 



