P 1 -RA USTW.-E—BO T VS. igi 



-ance of a central Hue ; this, however, is mainly formed of an 

 obscure elongated discal streak ; cilia shining yellow, pre- 

 ceded by a parallel brownish-yellow stripe : all these markings 

 are somewhat faint. Hind wings broad but rather angulated 

 at the apex, and the hind Tnargiu flatly rounded ; shining i^ale 

 yellow, with a faint rippled brownish central line, and a 

 similar curved line along the hind margin ; cilia shining 

 pale yellow. Female closely similar, but a very little 

 stouter. 



Undersides of all the wings pearly whitish yellow ; second 

 and subterminal lines of the fore wings faintly i^urplish- 

 grey, the orbicular and reniform stigmata visible, rather 

 rounded, and of the same colour. Hind wings showing only 

 a very faint middle line. Body and legs yellow. 



Not variable. 



On the wing at the end of June and in -luly. 



Larva thickest at the seventh segment ; head very pale 

 red with a dark dot on the top of each lobe and another on 

 each cheek ; dorsal plate paler, with hardly any tinge of red, 

 having six small dots along its front edge, a double dot on 

 each side, then a transverse row of eight, varying in size, and 

 a pair close to the dorsal line, on its hinder margin ; colour 

 of the body dull opaque white, with perhaps the faintest 

 tinare of srreen ; dorsal region showing a faint shade of black 

 from the internal vessel ; undersurface 3"elIowish-white ; 

 spiracles black ; legs rich brown ; raised dots small and 

 black, placed on pale indian-ink warts which glitter bril- 

 liantly. (Condensed from Eev. J. Hellins' descriijtion.) 



August till May or the beginning of June, on Centaurra 

 nigra (knapweed) ; hybernating while small in a tough flat 

 cocoon of rounded outline, formed of closely woven pale 

 grey silk, and placed upon a fallen leaf. The very young 

 larva spins a little silken web at the side of the midrib of 

 the Centaurea leaf toward the stem, and eats little holes in 

 the leaves. After hybernation it seems to continue to hide 



