156 LEPIDOPTERA. 



black streaks, of which a long one from the base reaches 

 one-third the length of the wing ; other shorter ones are 

 numerous, partially upon portions of the nervures ; others, 

 more irregular, are along the dorsal region ; and one, more 

 distinct, on the dorsal margin, having an edging of blackish 

 projecting scales as a sort of prominent tuft ; toward the 

 hind margin is a series of black triangular dashes between 

 nervures, pointing inward toward other more arrow-shaped 

 streaks ; along the costa is a succession of blackish clouds 

 and streaks ; cilia mixed grey and white. Hind wings white 

 with a faint indication of a grey lunule, a series of grey 

 dashes on nervures beyond the middle of the wings, and a 

 marginal series of grey lunules ; cilia whitish. 



Antennge of the female threadlike ; body much stouter ; 

 fore wings longer, narrower, and rather browner ; otherwise 

 similar. 



Underside of the forewings unicolorous light brown, or of 

 that colour one half their length, the remainder whitish with 

 brown nervures ; hind wings white with brown nervures and 

 a grey central lunule ; body pale brownish ; legs brown, 

 densely tufted with long whitish scales ; the first pair having 

 in front a distinct shining black spur. 



Usually not variable, but Dr. Mason has a male extremely 

 white with the grey clouds and black streaks strongly 

 marked ; hind wings brilliantly white, and the margin dotted 

 with black. 



On the wing in November and the beginning of December. 



Lakva stout, nearly cylindrical, head rather smaller, twelfth 

 segment stout, having a slight appearance of a dorsal hump ; 

 anal segment sloped rapidly off; prolegs all well developed 

 and in use ; all the legs stretched out very widely apart, 

 especially when beaten off its food (hence its common 

 English name of the "Sprawler"). Head round, green or 

 olive-green ; body yellowish-green or whitish-green ; dorsal 

 line yellowish-white, with a deep green stripe on each side ; 



