nandlirsoli] 



CANADIAN- FOSSIL INSECTS 119 



Strongly divergent branches. With its posterior branch the cubitus 

 forms a steep downward-trending curve, which strikes the posterior 

 margin above the centre. Immediately behind the cubitus and 



Pig. 26. — Penthetria canadensis, Handlirsoh. 



parallel with it runs a fold; and farther on, but likewise parallel 

 with the cubitus, the anal vein proceeds to the posterior margin. The 

 mediocubital vein is situated fully twice as far above the radio- 

 cubital cross-vein as is the latter above the fork of the media. In 

 the costal region this wing 'also shows very strong pigmentation. 



Penthetria curtula, sp. nov. Pig. 2Y. 



Locality: Horsefly mine— (July 20, 1906. L.M.L.). 



A wing 8™™ long, whose breadth and length are in tihe proportion 

 of 1 : 2. The anterior margin is gently curved, while the posterior 

 border is strongly arcuate. The nearly (straight radius extends not 

 quite seven-tenths the length of the wing. The sector issues just 

 above the first third of the length of the wing; while above its bifur- 

 cation — which occurs in half its own length — it forms an obtuse 

 angle, and then a flat curve. The anterior branch is remarkably short, 

 widely divergent, and fulses in the margin nearer to the radius th(an 

 to the posterior branch. The radiomedial cross-vein is equidistant 

 from the forking and the origin of the sector, and lies somewhat 

 above the middle of the wing. Somewhat below the middle of the 



Fig. 27. — Penthetria curtula, Handlirsch. 



wing, the media separates into two moder'ately divergent branches. 

 The cubitus slopes downward in a fairly steep curve, and with its 

 3337— 3i 



