Handlirsch] 



CANADIAN I'OSSIL INSECTS 



107 



A beautifully preserved wing, 12"°' in length, three times as long 

 as broad, with opaque borders along the veins. The apex of the wing 

 is sub-acute, the anterior and posterior margins being about equally 

 curved. At about seven-tenths the length of the wing, the radius 

 fuses in the margin in a rather strong curve. The sector originates 

 at about one-fourth the length of the wing and bifurcates at about 

 half its own length, and directly above the termination of the radius. 

 The superior branch presents a nearly sigmoid curve, fusing in the 

 margin midway between the posterior branch and the radius. The 

 radiomedial cross-vein is situated distinctly nearer to the bifurcation 

 than to the origin of the sector. The^ media divides in the apical 

 half of the wing, its branches being strongly arcuate but not widely 

 divergent. The cubitus draws toward the posterior margin in a 

 relatively steep but gentle curve, its anterior branch fusing some- 

 what distally from the middle of the wing, while its posterior branch 

 meets the margin at just two-fifths the length of the wing. Close 

 behind the cubitus, and nearly parallel with it, runs a distinct 

 fold, and farther on is a simple anal vein. The medioeubital vein 

 lies more than twice as far above the radiomedial vein as the latter 

 is anterior to the bifurcation of the media. 



Fig. 10. — Penthetria 1 pictipennis, Handlirsch. 

 To this species probably belongs a second specimen from the right 

 branch of the Tulameen river, IJ miles above Princeton (August Y, 



