BY R. J. T1LLYARD. 8<1 



Genus Scytixoptera Handl . (Text-fig. 4) . 



In Text-fig. 4, I have shown the venation of Scytirioptera 

 kokeni Handl., from the Upper Permian of the Kama River, 

 Kussia. for comparison with Chiliocycla, Mesoscytina and other 

 Ipswich genera defined in this paper. Points to be noted are the 

 peculiar shape of the costal margin, the manner of branching of 

 K. the absence of any definite branch of M, and the very regular 

 arrangement of the veins ending on the distal border of the 

 fcegmen. The tegmen is tough and leathery in appearance, and 

 is finely pitted all over. 



The genus is monotypic, the genotype having been originally 

 described by Handlirsch in 1904 (Mem. Acad. Petersburg, xvi., 

 (5), 3. 1904. PI., figs. 3, 4. ) . See also Handlirsch (3, p. 392) . 



Genus Mesoscytina, n.g. (Text-figs. 5-6). 



Closely related to Scytirioptera Handl., from which it differs 

 in the following points: — M branches into two at about the 

 middle of the wing; M 3+4 . again divides into M 3 and M 4 dis- 

 tally; the branches of M are connected by cross-veins, so that 

 two dosed cells are formed between them. R remains un- 

 branched until well beyond half-way along the wing, when it 

 gives off an ascending branchlet (R^, and soon after divides 

 into Ko_ 3 and R 4+5 the latter again dividing into R 4 and R 5 . 

 Two cross-veins between R 4+5 and M 1+2 and two between M 3+4 

 and Cu la ; the latter diverging strongly from Cu 2 at its origin. 

 The basal portion of the costal margin is convex, instead of 

 being slightly concave as in Scytinoptera, and there is a short 

 vein close below it, which is probably Sc. 



Genotype, Mesoscytina australis, n.sp. (Upper Triassic, 

 Ipswich Q. ) . 



Two specie- are represented in the collection: they may be 

 distinguished as follows: — ■ 



Sc faintly indicated, curved, reaching- well beyond the curved 

 basal portion of R. — - 3/. australis, n. sp. 



Sc strongly marked, straight, only reaching about as far as the 

 curved portion of R. M. affinis,n. sp. 



Mesoscytina australis, n.sp. (Text-fig. 5). 



Total length, 9.4 mm.; breadth at apical end of clavus, 3.5 

 nun. Tegmen complete, except for the absence of the clavus, 



