112 Mr. E. Doubleday's Description 



the outer margin, considerably below the apex. Cell less than half 

 the length of the wing. Upper disco-cellular nervule wanting ; the 

 first discoidal nervule, arising from the sub-costal nervure, near 

 the end of the cellule formed by its junction with the first sub- 

 costal nervule. Middle disco-cellular nervule arising before the 

 origin of the first discoidal nervule, straight, shorter than the lower 

 disco-cellular, which is first directed immediately across the wing, 

 then outwards to the third median nervule, which makes a slight 

 angle at the point of union. First median nervule thrown off at a 

 point about half as distant from the end of the cell as from the 

 base of the wing, slightly curved downwards, as is the second. 

 Third median nervule slight, curved upwards. Posterior wings 

 elongate, caudate, dentate externally ; or somewhat quadrate, cau- 

 date or rounded ; the inner margin in the males (of some species 

 at least) folded back upon the under surface of the wing, forming^ 

 a semi-oval lobe, the inside of which is lined with scales or jointed 

 hairs of a very singular structure. Precostal nervure extending 

 beyond the margin of the wing, in the form of a short, stout bristle, 

 simple in the males, divided at the termination in the females, not 

 received in either sex into a socket on the under surface of the 

 upper wings. Costal nervure separating from the sub-costal at 

 the base of the wing, then uniting to it for some distance, so as to 

 form a small triangular cellule, again separating from it, and ter- 

 minating beyond the middle of the inner margin. First sub-costal 

 nervule terminating at the outer angle of the wing. Discoidal 

 nervure thrown off from the sub-costal nervure at right angles to 

 it, a little above its division into its two nervules, then bent at a 

 right angle, and directed towards the outer margin of the wing, 

 slightly bent where the short lower disco-cellular is united to it. 

 Third median nervule slightly bent at the point where it receives 

 the lower disco-cellular. Anterior feet, with the femur, nearly 

 twice as long as the tibia, slightly dilated in the middle. Tibia 

 short, armed within, about the middle, with a stout slightly curved 

 spine, extending to the apex or nearly so, and covered in the males 

 (of some species at least) by a tuft of long curled hairs. Tarsi 

 with all the joints sub-cylindric, spiny laterally and below, except 

 the fifth, which is bare below ; the first joint longer than the rest 

 combined, second about one-third the length of the first, third 

 about half the length of the second, fourth and fifth nearly equal, 

 rather more than two-thirds the length of the third. Claws curved, 

 serrate internally about the middle, the base covered with a tuft 

 of stiff hairs. Paronychia sub-ovate, fringed with long hairs. 

 Pulvillus broad, not so long as the claw. Middle and posterior 



