LARENTID.£—COLLIX. 21 



margin edged with black streaks ; cilia wliitish-brown. 

 Female very similar, but a little larger, and slightly paler ; 

 the markings rather more distinct. 



Underside of the fore wings very pale yellow-brown, 

 shaded upon the nervures with smoky-black ; discal spot 

 black, followed by a distinct elbowed smoky-black stripe, 

 and this by another, more clouded but less angulated ; hind 

 margin smoky-brown. Hind wings of the same colour ; 

 central spot very conspicuous, black, placed rather high 

 up ; beyond the middle are smoky-black stripes as in the 

 fore wings. Bodj^ and legs yellow-brown, shaded with 

 umbre. 



Only a very little variable in the tone of the ground 

 colour — browner or more tinged with smoky-black — and in 

 the distinctness of the markings. 



On the wing in June and July. 



Larva. Length nearly an inch, and of average propor- 

 tionate bulk ; head rather flattened above but rounded at 

 the sides, slightly narrower than the second segment, into 

 which it can be partially withdrawn ; body cylindrical and 

 of almost uniform width throughout, tapering only a little in 

 the first and last three segments ; skin smooth and soft, 

 having a few short and almost imperceptible hairs ; head 

 pale brown ; body bright pale green ; a green pulsating 

 vessel is visible between two whitish lines, forming a dorsal 

 stripe ; subdorsal lines also white, and there is another 

 whitish line below them, but some distance above the 

 spiracles ; spiracular stripe broad, whitish with a very faint 

 blue tinge ; segmental divisions yellowish ; spiracles black ; 

 ventral surface almost uniformly pale green. (G. T. Porritt.) 

 July and August, sometimes in September, on Lysimachia 

 vulgaris (yellow loosestrife), feeding upon the buds, blossoms, 

 and leaves, hiding during the day on the undersides of the 

 leaves, and greatly preferring those plants which are 

 sheltered under sallow or other bushes. 



