L YC.-ENID^. 75 



it, or only a few scales of white, to pure white ; on the under 

 side, from ordinary black spots in a white ring, to pure white 

 spots." He has met with two having the under side of a 

 dull leaden brown, all the spots black with faintly pale 

 rings, and no white whatever ; and others of the ordinary 

 colour, but without white rings beneath, or with only two or 

 three on the hind wings, or only three or four on each wing. 

 One from the same district in Mr. S. Stevens" collection has 

 the white spot on the upper side elongated. A Scottish 

 aberration exists with white dashes upon the upper side, and 

 the celebrated Durham locality actually furnished the late 

 ^Ir. Sang with a specimen having a white central spot on the 

 upper side of the liind wings, similar to that on the fore. 

 The gi'ound colour is also variable, especially in the south, 

 being sometimes extremely dark, at others— but rarely — of a 

 pale silky brown. In Scottish specimens it has occasionally 

 clouds of whitish scales near the inner margin or apical 

 region. Occasionally some of the spots of the under side are 

 absent, the central and marginal being the most constant and 

 reliable. 



Double-brooded — end of May and in June ; again in 

 August. 



Larva A inch in length ; onisciform ; broad from lateral 

 expansion ; with segments rather deeply divided, and each 

 having a pair of prominences on the back, one at each side 

 of the dorsal line. Feet hidden by the projecting sides, 

 pinkish ; pro-legs also hidden, green. Colour bright green, 

 with abundant white hairs ; dorsal line brown, greenish- 

 brown, or pui-plish-brown ; spiracular stripe broadly pink, 

 sometimes merging into purple below ; head black, retracted 

 beneath the second segment. When younger the larva is 

 paler green, and then shows oblique, still paler, double lines 

 on each side of the dorsal region. On Helianthrmum vidgarc 

 (Rock rose) and Erodiam cicularinm (Stork's bill) fi-om 

 September to April or May, and again in July, eating only 



