l!^EUKOPTERA— PLANIPENNIA— HBMEROBINA. 167 



ward to form the well-rounded tip ; the lower margin is rounded and full, 

 especially away from the base, making the wiug broadest beyond the 

 middle. The hind wings are slenderer or about three and a half times 

 longer than broad, broadest in the middle, the lower margin being uni- 

 formly rounded, while the costal margin, not expanded at the base, is 

 straight throughout to the apical fourth, where the wing tapers considerably 

 on both sides, being subacuminate, though the extreme apex is well rounded. 

 The neuration, at least below the radius, is essentially the same in both 

 wings, but next the costal margin differs considerably. In the front wings 

 the subcostal vein terminates on the costa a little beyond the middle of the 

 apical half of the wing, and is connected with the distant arching costa by 

 seventeen or eighteen cross-veins, the proximal ones of which are trans- 

 verse, the distal somewhat oblique ; the radius runs close and parallel to 

 the subcosta throughout the course of the latter, and thereafter at a similar 

 distance from and parallel to the curve of the margin, as far as the very apex 

 of the wing, connected nowhere to the veins above by cross- veins. In the 

 hind wings the radius and subcosta are so closely united as to be nearly 

 connected, and are so represented on the plate, and terminate together, ap- 

 parently a little beyond the middle of the apical half of the wing; as in 

 the front wings, the subcosta is connected by cross-veins to the proximate, 

 straight costa. There is a single sector which springs from the radius a 

 little before the middle of the basal half of the wing: in the front wino-s 

 (nearer the base in the hind wings) and runs midway between the radius 

 and the upper cubital in a regular zigzag ; the cells, thirteen or fourteen in 

 number, formed by the cross-veins between the sector and the radius, as 

 well as all those below, are broader than long and tolerably regular. The 

 upper cubital vein courses regularly through the middle of the wing, and in 

 its basal half, at least in the front wing, is nearly straight, while apically it 

 is noticeably zigzag, terminating in the sector of the radius just before the 

 tip of the wing. The lower cubital vein runs in a uniform course rather 

 nearer the margin than the upper cubital vein, subparallel to the former, 

 and is irregularly straight or zigzag, and also joins the sector of the radius 

 or terminates against an apical cell at the tip of the wing ; between the two 

 cubital veins one of the basal cells is divided longitudinally into two nearly 

 equal cells, as in the genus Nothochrysa (but which is not represented on 

 the plate as it should be), where the oblique vein appears on the upper wing ; 



