110 CONTEIBDTIONS TO CANADIAN PALEONTOLOGY 



mediocubital eross-vein is situated more than three times as far 

 above the ladiomedial cross-vein as is the latter anterior to the furca- 

 tion o£ the media. Directly below the cubitus and parallel with it 

 runs a distinct fold. Still farther below may be seen the basal 

 portion of a strongly curved anal vein. 



A second wing lies on the same slab. It is not so well preserved 

 as the specimen here described, yet undoubtedly belongs to the same 

 individual. 



Pentheiria falcatula, sp. nov. Fig. 14. 

 Locality: Tulameen river, opposite Vermilion cliff — (August 6, 

 1906. L.M.L.). 



Fig. 14. — Penthetria falcatula, Handlirsoh. 



A distinctly cambered wing 11"™ i^ length, the breadth and the 

 length being in the proportion of 1: 2-6. The radius stretches seven- 

 tenths the length of the wing, and is but slightly curved; its sector 

 springs off anterior to the first third of the length of the wing, bifur- 

 cates at half its own length, and is distinctly arcuate. Its anterior 

 branch is moderately long, curved, and fuses in the margin directly 

 below the first third of the space between the radius and the posterior 

 branch of the sector. The radiomedial cross-vein is situated midway 

 between the origin and bifurcation of the sector, and immediately 

 above the centre of the wing. The media dichotomizes a short 

 distance below the middle of the wing, and forms two widely diverg- 

 ing branches. The cubitus forks at one-third the length of the wing, 

 and its posterior branch proceeds in a broad curve toward the lower 

 margin, where it fuses somewhat anterior to half the length of the 

 wing. A distinctly curved anal vein is present. The mediocubital 

 cross-vein is twice as far from the radiomedial cross-vein as is the 

 latter from the furcation of the media. 



