142 LEPIDOPTERA. 



but stronp;ly indicated by a black-brown or deep black blotch, 

 enclosing paler spaces, wbicli sometimes divides it from front 

 back, but in other cases is limited to the back portion, the 

 tips of the crest-tufts being blacker ; fascicles white ; abdo- 

 men short, whitish-brown faintly barred with darker, the basal 

 segments covered with long white scales, those on the dorsal 

 ridge forming a horseshoe-shaped black crest ; lateral tufts 

 very faint ; anal segment broad and blunt, with a broad short 

 tuft. Fore wings long and unusually narrow ; costa but 

 very slightly curved : apex sharply rounded, and rather 

 produced ; hind margin oblique, very faintly hollowed toward 

 the middle, then filled out and rounded toward the anal 

 angle ; dorsal margin very straight ; ground colour whitish- 

 grey, yellowish, or even bluish-grey, in most cases very much 

 obscured by dark clouds and markings, but usually a stripe 

 of the ground colour lies along the dorsal margin, sometimes 

 extending to the anal angle ; the rest of the wing either 

 clouded with grey and brownish or more or less blackened. 

 In the grey foi'm, which alone shows satisfactory traces of the 

 markings, the basal line is absent and the first line only 

 indicated by a faint cloudy line uniting some dark streaks on 

 the nervui'es ; second line a faint series of whitish dots 

 edged on each side with dark dots on the nervures ; between 

 these is a slender, squarely augulated, faint brownish 

 central shade which at its angle touches an ovate blackish 

 spot in the middle of the wing ; subtermiual line pale but 

 excessively indistinct, broken by black dashes between the 

 nervures ; space outside it darker brownish-grey, but this is 

 cut off below the apex by an oblique, similar but darker, 

 streak ; orbicular and reniform stigmata hardly perceptible 

 or only showing small portions of brown marginal lines ; 

 claviform stigma forming a long narrow loop, bordered with 

 dark grey, extreme hind margin edged with thick black 

 lunules. But in a somewhat more frequent form a thick 

 black streak from the middle of the base spreads into an 

 extensive deep black cloud which envelops the stigmata 



