HnnclHi-sch] CANADIAl^- J-OSSIL INSECTS 113 



A wing 12"™ in length, whose breadth to the length is in the pro- 

 portion of 1:2-7. The greatest width is somewhat distal to the 

 middle of the length of the wing. At its beginning the anterior 

 margin runs off straight, but bends sharply downward in the terminal 

 third. The posterior border is symmetrically curved. The radius 

 extends slightly beyond seven-tenths the length of the wing, and 

 terminates in a strong retroflex forward curve. The sector springs 

 forth close to the first third of the length of the wing, and is dis- 

 tinctly arcuate. Its bifurcation takes place at half its own length, 

 and the strongly curved anterior branch follows in the same direc- 

 tion as the posterior branch, reaching the anterior border exactly 

 midway between the radius and the posterior branch. The radio- 

 medial cross-vein is situated somewhat nearer to the furcation than 

 to the origin of the sector, and just distal to the middle of the wing. 

 The media divides quite a distance below the middle of the wing; 

 its anterior branch is sjrmmetrically curved, and at the end converges 

 toward the nearly straight posterior branch. The trunk of the 

 cubitus and its posterior branch proceed in a gentle uniform curve 

 toward the posterior margin, which they meet at half the length of 

 the wing. The anterior branch is slightly curved. The mediocubital 

 cross-vein is situated not quite twice as far above the radiomedial 

 cross-vein as is the latter anterior to the bifurcation of the media. 

 The fold follows close to the cubitus. The first anal vein is slightly 

 divergent, and at its base the remnant of a second anal vein may bo 

 seen. 



This wing is especially well preserved, the base, with the typical 

 cross-veins between the costa, radius, and media being distinctly 

 visible. An anal lobe, with opaque borders along the veins, is also 

 to be seen. 



Pentheiria pulchra, sp. nov. Fig. 19. 

 Locality: Tulameen river, right bank, one mile above Prince- 

 ton— (August 7, 1906. L.M.L.). 



Fig. 19.— Penthetria pulchra, Handlirsch. 



