I3Y R. J. TIU,YARD. 



197 



Further evidence on this interesting point may be found on 

 p. 207 of this paper. 



Sterkochorista prustrata, n.sp. (Text-fig. 23). 

 Total length 7-5 mm., this being almost the full length of the 

 wmg (a little of the base missing). Greatest width of preserved 

 portion, 2-3 mm., representing an actual greatest width of the 

 complete wing of about 3 mm. The impression of the wing is 

 faint but good; there can be no doubt of the correctness of the 

 condition of Cu 2 as drawn, but the tracing of the closely arranged 

 blanches of M is not an easy matter. Cuj can be followed quite 



M.. 

 Cu- 



1A 



Text-fig. 23. 

 Stereochoristafrustrata, n.g. el sp., forewing. Upper Trias of Ipswich, Q. 

 pa, posterior areulus. Rest of lettering as usual in Comstoek- 

 Needham notation; ( x 12). 



clearly as a strong vein for some distance, when it suddenly ends 

 quite definitely, sending very weak and widely diverging branches 

 (possibly cross-veins) to M 4 above and Cu 2 + 1 A below. A care- 

 ful examination of these two veins shows us that M 4b and Cu, + I A 

 are definitely tending to converge, so that there is not a suffi- 

 ciently wide space left between them distally for Cu, to be con- 

 tinued: this may possibly account for the peculiar manner in 

 which it ends, f have carefully examined the whole of the wing 

 in this region, and can (ind no evidence of any break or damage; 

 the condition of < 'u, is evidently a natural one, though certainly 

 most unusual. 



16 



