156 LEPIDOPTERA. 



just beyond is a very slender transverse brown stripe; nervures 

 distinctly darkened ; body and leg tufts pale yellowish-brown ; 

 legs darker. 



An extremely constant species in colour and (absence of) 

 markings. 



On the wing in June and July ; but a partial second 

 generation has been reared late in the autumn. 



Larva thick, cylindrical, the head, second, and anal seg- 

 ments but a trifle smaller. Head shining olive-brown ; on the 

 second segment is a blackish-grey plate, rounded behind, 

 through which pass the pale dorsal and subdorsal lines ; 

 ground colour of the back and sides very pale ochreous ; a 

 dark grey diamond-shaped mark mottled with olive on each 

 segment, having on its edges the usual four tubercular dots, 

 rather large, and whitish, ringed with blackish-grey ; dorsal 

 line whitish edged with blackish-grey, but more or less 

 suffused with dark grey and olive as it passes through the 

 middle of the diamond shapes, though distinct at the begin- 

 ning of each segment ; on the anterior portion of each seg- 

 ment is a very short blackish-grey linear mark on each side ; 

 subdorsal line whitish outlined with dark grey and in its 

 course sometimes touching each posterior pair of dorsal dots ; 

 sides mottled with dark grey and olive, having oblique 

 streaks and a pale line of ochreous above the legs ; spiracles 

 brownish-orange, edged with dark grey ; undersurface and 

 legs pale greenish-brown. When young pale greyish-ochreous 

 on the back ; brownish in the middle, through which runs a 

 fine white dorsal line enclosed between two black outlines, 

 which are thrice united across the white line at the 

 beginning of each segment, and are suggestive of an 

 irregular chain pattern ; sides, legs, and undersurface of a 

 darker dull olive-brown : above the legs is a slender whitish 

 longitudinal line ; the subdorsal line is brown, interrupted 

 near the middle of each segment by a short oblique streak 

 of pale ochreous from the back ; midway along the side 



