TRIFID^. 21 r 



dull green, or greenisli-grey ; dorsal line darker, and con- 

 taining a few white specks ; subdorsal line whitish, inter- 

 rupted, sometimes very distinct, but often absent ; shaded 

 above, and with an ill-defined black dash on each segment \ 

 spiracular stripe broad, yellowish-green, greenish-white, black- 

 brown or ochreous, very conspicuous ; spiracles white, each in 

 a black cloud. Legs very pale brown ; prolegs and under- 

 surface dull yellowish-green ; raised dots grey or pale green. 



Another form is dull bluish-green on the back and sides ; 

 undersurface paler ; dorsal line an irregular string of ex- 

 ceedingly small whitish dots edged with black atoms ; 

 spiracular stripe broad, greenish-white, shaded above with a 

 cloud of similar black atoms ; subdorsal lines whitish ; head 

 yellowish-green ; legs and prolegs tinged with reddish-brown, 

 (Chas. Fenn.) 



When just hatched dusky brown with a blackish head ; 

 after the first moult light green, with the head yellowish ; 

 after the second, deep green, with paler lines, and the head 

 yellow ; afterwards changing to various shades of olive-green, 

 brownish-green, and dirty greenish-brown. 



July to October, on almost every description of herbaceous 

 plant, but especially attached to cabbage and other Crucifera\ 

 and quite sufficiently fond of garden flowers and other culti- 

 vated plants ; not even always confining itself to low-growing 

 plants, since it has been found feeding on oak ; and in con- 

 finement hardly any green leaves are rejected. Feeding at 

 night, and hiding in the daytime under herbage on the 

 ground, or under dead leaves or any covering. Probably it 

 is for this purpose of hiding from light that it very often eats 

 its way into the middle of a solid head of cabbage, and there 

 resides, to the woful damage of the vegetable, and with the 

 result of its own appearance, now and then — cooked — where 

 its presence is neither expected nor desired. 



Pupa elongate, shining ; anal extremity spiked ; wing- 

 cases somewhat semi-transparent ; colour pale mahogany-red, 



