422 Mr. R. M'Lachlan on 



pleurae ocliraceous. Antennae strong, shorter than the wings, 

 brown, with yellowish annulation.s, and tlie basal joint is 

 dingy yellowish. Palpi yellowish or testaceous. Legs 

 testaceous, with not very numerous stout black spines on the 

 tibiae; on the anterior and intermediate tibiae each spine arises 

 from a black spot; tips of the tibiae and of each tarsal joint 

 black. 



Anterior wings long, rather narrow, elliptical at the apex, 

 the membrane finely granulose, and clothed, as are the veins, 

 with fine short blackish hairs ; on the postcostal region 

 these hairs are long and strong, and there is a dense fringe of 

 blackish hairs at the base of tlie costal margin. The ground- 

 colour is smoky greyish (browner in the female), closely 

 sprinkled with minute pale points, and on each side of the 

 veins these points alternate in an irregular manner with 

 darker spaces (especially on the apical sectors) ; on the lower 

 edge of the cellula thyridii and on tlie lower edge of the 

 postcosta is an interrupted blackisli line; at the termination 

 of the postcostal cellules is a rather conspicuous rounded pale 

 spot. Neuration scarcely darker than the ground ; discoidal 

 cell very long and narrow, leaving only a short footstalk, 

 apical cells all long, the first longer than those succeeding, 

 oblique at its base, second to fourth nearly equal. 



Posterior wings pale smoky grey, slightly iridescent ; at 

 the base of the costal margin are tufts of long silky pale 

 hairs, and there is a fringe of similar hairs on the anal 

 margin. Neuration pale, the anal sectors darker. 



In the male the margin of the last dorsal segment is some- 

 what raised and excised in the middle, and proceeding there- 

 from is a black thickened portion produced into a rounded 

 knob on either side and deeply excised in the middle. 

 Superior appendages small and not prominent, ear-shaped or 

 broadly sickle-shaped, yellowish, with pale hairs (iutermediate 

 appendages doubtful). Inferior appendages arising nearly 

 contiguously from each side of the middle of the margin of 

 the last ventral segment ; viewed ventrally they are short, 

 flattened, the inner edge deeply excised in its apical half and 

 clothed with long yellowish hairs (concolorous with the 

 appendages themselves) ; all the inner parts concealed. 



In the female the margin of the last dorsal segment is 

 slightly produced triangularly. Appendices flattened, sub- 

 triangular, their outer surface excavated. Side-pieces of last 

 ventral segment small. Vulvar scale large, prominent, and 

 yellow, consisting of two broad oblong side-lobes, rounded 

 externally, and a contiguous middle lobe in the form of a long 

 acute triangle of equal length with the side-lobes. 



