326 I.EPIDOPTRRA. 



Atlantic islands has readied an extreme form, the whole 

 insect — head, body, and fore and hind wings — being .some- 

 times dark brown or even blackish-brown, with the transverse 

 lines and rippiino; a little blacker. Uoing to an extreme in 

 the opposite direction, an aberrant sjiecimen in the collection 

 of the late .Mr. Nicholas Cooke, in the Liverpool Museum, 

 is of a smooth uuicolorous yellow, without the indication 

 of any marking whatever. Another such specimen is in 

 Mr. Webb's collection. 



On the wing in June, July, and August. Only one general 

 brood ; but it is noticeable that rather small specimens are 

 apt to occur, in perfect condition, quite late in the season, 

 and there is as yet no evidence to show whether these are 

 produced by retarded slow-feeding larvto, or are casual indi- 

 viduals of a very restricted second generation. 



Larva moderately stout and nearly cylindrical ; segmental 

 divisions well marked, yellow ; head small, rounded, shining 

 bluish-green or bright green, faintl}' reticulated with brown ; 

 body yellowish green : dorsal line darker green, very faint 

 on the front segments ; subdorsal lines indistinct, yellowish- 

 white ; spiracular lines waved, similar in colour; raised dots 

 faintly white ; undersurface deej)er green, with numerous 

 slender yellow longitudinal lines, and sometimes having on 

 each segment trto dusky purple blotches; spiracles brown, 

 the front pair very distinct ; legs semitransparent pale green ; 

 lirolegs deeper green. 



Very variable ; those figured by Mr. W. liuckler are, 

 respectively, blue-green, apple-greeu, yellow-green, pale drab, 

 brownish-drab, and puqjlish-brown, in the last two cases the 

 undersurface being more yellow-brown, in tho rest following, 

 with the head and legs, the tint of the ground colour. 



August till April or the beginning of May, hibernating 

 while still small : on cliickweed, dock, sorrel, strawberry, 

 dandelion, rest-harrow, and other low growing plants, and on 

 various grasses, llofmaun mentions a second generation, 



