88 LEPIDOPTERA. 



Female a little larger ; with the antenase more shortly 

 pectinated, and the body stouter ; otherwise similar, except 

 that the hind wings are sometimes a little more clouded with 



gi-ey. 



Underside of the fore wings smoky-grey ; costal margin 

 white blotched with black ; hind margin white, with the 

 black marginal spots very distinct ; hind wings clear white, 

 with black marginal dots, and a distinct elongated black 

 central spot ; beyond this is, in some cases, a faint elbowed 

 transverse grey line. Body beneath rather densely clothed 

 with downy white scales ; legs grey in front, spotted with 

 black, heavily tufted with white scales behind. 



Variation is mainly toward a greyer tinge of ground colour, 

 or suffusion over the fore wings of the purplish-grey of the 

 central band ; the black hollowed line, which edges the 

 central band outwardly, is also subject to much change both 

 in distinctness and direction, often becoming a faint grey 

 line, sometimes disappearing except at its origin on the 

 costal margin. Occasionally, well marked specimens have 

 a considerable mottling or tinge of orange in the basal area 

 and the pale portion beyond the dark band, and the orange 

 edging of the lines increased. 



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



Lakva smooth ; head rounded, retractile ; second segment 

 squared in front, and projecting laterally ; third segment 

 peaked ; anal prolegs wanting, replaced by two long horny 

 tails covered with minute black spines. Bright yellowish- 

 green dotted with yellow ; dorsal line yellow to the third 

 segment, afterwards darker ; a broad dull green dorsal blotch, 

 edged with dark red-brown, from the second segment, forms 

 a blunt point on the apex of the third, but is continued to 

 the tail as a large diamond-shaped dorsal marking. This 

 marking is widest on the eighth segment where it reaches 

 below the spiracles, narrowest on the eleventh and twelfth, 

 widening again a little on the latter ; the sides, within this 



