ii6 LEPIDOPTERA. 



line, indented, blackish, wliicli on reaching the large blackish 

 blotch sometimes continues across it as a white indented line, 

 but in other cases becomes perceptible only by dots on the 

 nervures ; central portion of the costal margin tinged with 

 whitish, sometimes broadly so ; hind margin narrowly blackish- 

 brown, edged with a black line ; cilia dark grey dashed with 

 black, and continued round the apex on to the costa. Hind 

 wings short and rather small, rounded, white ; the nervures 

 faintly brownish ; at the anal angle is a small triangular smoky- 

 black patch, containing whitish and black dots ; cilia white 

 with grey dashes. Female with antennae slightly dentated ; 

 hind wings faintly tinged with grey ; otherwise similar. 



Underside of the fore wings dark grey with the discal 

 lunule reddish, and some whitish dusting near the margins ; 

 hind wings white, clouded with grey ; body and legs grey, 

 the latter dark-brown in front. 



Said to be upon the wing at the end of April and in May, 

 and in a second generation in July and August. 



Larva. Head rather large, following three segments more 

 slender, the sixth seventh and eighth each with a large 

 dorsal, curved-back, conical hump, and one on the twelfth of 

 a pyramidal shape, hinder segments usually raised, with 

 very small anal prolegs ; the ventral prolegs being large and 

 robust. The whole shape when at rest is most singular, the 

 middle and hinder portions so elevated that the large humps 

 point toward each other, and nearly meet. Head pale grey ; 

 body, with the humps, pale grey or brownish-grey, with 

 numerous transverse wrinkles and darker shades ; dorsal line 

 rather narrow, darker grey or reddish-brown, and passing 

 over the dorsal humps ; sub-dorsal line slender, double, faintly 

 grey or brown ; spiracular line darker and broader, shading 

 down to the feet, which are barred or ringed with whitish ; 

 raised hinder segments more distinctly lined and clouded than 

 the rest; spiracles black. Before spinning up it changes to 

 blackish-brown or purplish-brown. 



