1907.] 



NATURAL SCIENCES OF PHILADELPHIA. 



157 



but rounding narrowly from the greatest expansion to the cephahc 

 margin; shaft slightly exceeding the expanded portion in length, mod- 

 erately narrowed, slightly expanded caudad; margias unarmed, 

 dorsum without distinct carina. Tegmen large, hyaline except for the 

 semi-opacpie costal field, in shape elongate-ovate, the greatest width 

 at the distal third, costal and sutural margins arcuate proximad and 

 distad, apex narrowly rounded; median vein furcate with each 

 arm again furcate; discoidal vein furcate proximad, the caudal arm 

 again furcate; principal axillary veins three in number; stigma very 

 weak, linear, crossing the discoidal vein. Wing about tw^ce as long as 

 broad, costal margin straight in the proximal two-thirds, strongly 

 arcuate in the distal third, apex slightly acute, narrowly rounded, 

 caudal margin of the projecting portion of the anterior field nearly 

 straight, oblique; humeral vein furcate near the base, the rami parallel 

 for the greater part of their length ; median vein furcate near the apex ; 

 discoidal vein trifurcate, the first being almost at the base, the second 

 nearly mesad, the third about the proximal third; axillary vein bifur- 

 cate, the first not far from the base, the other near the apex. Abdo- 

 men rather slender; supra-anal plate short, trigonal; subgenital plate 

 moderately produced and provided distad with two small styles; cerci 

 slender, acute, moderately exceeding the subgenital plate. Cephalic 

 coxa about two-thirds the length of the pronotum; cephalic femur 

 somewhat shorter than the pronotum, rather slender, armed with six 

 spines on the external margin (counting the genicular spine) and 

 tv.'elve of two sizes on the internal ; tibia slightly more than half the 



Fig. 1. — Photina brcvis n. sp. Tegmen and ■nnng of male type. (X 2.) 



