584 TERTIARY INSECTS OF NORTH AMERICA. 



at the thorax. The male antennae consist of ten joints, and they are monil- 

 it'onn, very gently and slightly decreasing in size to the tip. the apical joint 

 smallest, all together a little longer than the height of the head. Legs of 

 the male long and slender, all the femora of equal length (the middle pair 

 perhaps a little shorter than the others), slightly thickened, especially on the 

 apical half. All the tibiae are very long, slender, equal, covered below with 

 a dense clothing of very delicate and short hairs, and furnished above with 

 a row (?) of very short, delicate, minute, recumbent spines, the apex devoid 

 of spurs ; the first pair is about as long as the fore femora; the second is con- 

 siderably shorter than the middle femora, while the third pair is longer than 

 the hind femora. The tarsi are scarcely shorter than their respective tibiae; 

 the first joint is nearly as long as the rest of the tarsus, excepting on the 

 middle legs, where it only equals the two succeeding joints taken together; 

 the remaining joints are subequal in length (on the middle legs the second 

 and third joints are longer than the fourth and fifth), and the last is armed 

 with a delicate pair of divergent claws. The whole body and the appendages 

 are black. The wings are fuliginous, deepening in tone toward the front 

 margin; they are nearly as long as the body and about three times as long- 

 as broad. The first and second longitudinal veins are straight and approx- 

 imate to the front margin, the latter striking it scarcely beyond the middle 

 of the apical half of the wing, the former at about the middle of the third 

 quarter; the third longitudinal vein diverges from the second at some dis- 

 tance before the middle of the wing, is connected by the middle transverse 

 vein a little beyond the middle of the wing to the fourth longitudinal vein, 

 and forks either at a little more (<?) or at a little less (2) than one-third the 

 distance from the cross- vein to the apex of the wing, 1 the lower branch 

 striking the tip, while -the other, strongly curved, strikes the margin at 

 about one-third (<?), or a little more than one-third ($), the distance from the 

 apex of the second to that of ..the lower branch of the third longitudinal 

 vein ; the fourth longitudinal vein is very nearly straight until it forks, con- 

 siderably ((?) or a little (?) nearer the middle transverse vein than the origin 

 of the fork of the vein above ; the branches part widely at base, the upper 

 more arcuate than the lower ; the fifth longitudinal vein forks as far from 

 the base of the wins 1 as the divergence of the second and third longitudinal 



o o o 



1 Tin' HCXCS in this jji'mis iliilVr in m-iiratiou, and, as the wing attached to this body of the male dif- 

 fers from the other \vinn;s in the |>.-irtic''ilar ahovn mentio'ned, I look upon the others as belonging to 

 females of the sanut species, ami tlescnlm them accordingly. 



