Handlirsch] 



CANABIAN POSSIL IXSECTS 



105 



curve. The sector arises at one-fourth the length of the wing, and 

 in half its own length bifurcates almost exactly below the termina- 

 tion of the radius; the. 'anterior branch is arcuate, and fuses in the 

 anterior margin equidistant from the radius and the posterior 

 branch. The radiomedial cross-vein stands midway between the 

 origin and bifurcation of the sector. The media forks almost exactly 

 in the centre of the wing. The cubitus furcates just below the first 

 fourth of the length of the wing ; its posterior branch reaching nearly 

 to the centre, and its anterior member extending two-thirds the 

 length of the wing. The radiomedial cross-vein is situated only a 

 little nearer to the fork of the media than to the mediocubital cross- 

 vein. 



Penthetria puUa, sp. nov. Fig. Y. 

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

 1906. L.M.L.). 



Fig. 7 .—Penthetria pulla, Handlirsoli. 



Both wings are well preserved, 8°"° long — three times as long as 

 broad — and with a distinctly curved anterior margin. The radius 

 extends seven-tenths the length of the wing, its sector arising at 

 about one-third of the wing's length, and forking just above half its 

 own length directly anterior to the termination of the radius; its 

 anterior branch is slightly arcuate, and fuses immediately below the 

 first third of the distance, between the radius and the posterior 

 branch. The radiomedial cross-vein is situated distinctly nearer to 

 the furcation than to the origin of the sector. The media dichoto- 

 mizes just below (distally) the middle of the wing, its branches being 

 very much extended and strongly divergent. The cubitus forks at 

 about the first fourth of the length of the wing, its posterior gently 

 curved branch reaching nearly half the length of the wing, and its 

 anterior branch extending about three-fourths the length. The 



