NOTODONTIDM. 131 



a partial basal line ; first transverse line almost straight and 

 perpendicular, thick, black, edged inwardly by a slender 

 white stripe ; second line dark purple-grey, erect from the 

 dorsal margin, then bent outward, closely indented through- 

 out, and edged outwardly by a similarly indented white 

 stripe ; space between these two transverse lines white, 

 usually with a slender cloudy-grey transverse stripe or shade, 

 either in the middle or near to the first line ; toward the hind 

 margin is usually a faintly indicated whitish transverse line ; 

 at the end of the discal cell, in the white central band, is a 

 distinct elongated black spot or lunule ; cilia greyish-white, 

 dashed with dark grey. Hind wings rounded ; whitish, with 

 brown nervures ; a faintly grey shading from the base and a 

 greyish cloud across the middle ; hind margin pale-brown ; 

 cilia brown, partially tipped with white. Female with simple 

 antennte, the body stouter, fore wings usually of a deep 

 purple-brown, hind wings pale grey ; otherwise similar. 



Underside of the fore wings grey with the nervures darker, 

 costal margin tinged with glossy yellow ; central lunule, and 

 a band crossing it, dark grey ; hind wings white, with a 

 partial irregular dark grey central stripe ; body glossy 

 yellow-grey ; legs brown with extremely large fluffy tufts, 

 which are pale silvery grey, or whitish. 



Variation in this species is mainly in the depth of the 

 ground colour, the purple-grey being in some instances varied 

 with whitish clouding ; in other, more rare, cases the white 

 central band is obscured with grey, but the dark lunule or 

 stigma is always visible. A specimen in Mr. W. H. B. 

 Fletcher's collection has merely a broad white central band, 

 without transverse lines or markings, except the central 

 lunule ; outside the white band the hind marginal area in 

 this example is unicolorous grey. 



On the wing at the end of April and in May. 



Larva cylindrical, fat, glossy, head flattened in front, 

 rounded, shining pale green ; body green, dorsal region blue- 



