230 LEPIDOPTERA. 



smoky brown. Hiud wings and their cilia smoky brown. 

 Female similar, rather larger and darker. 



Underside of the fore wings leaden black with white costal 

 dots. Hind wings leaden white. 



On the wing in July and August. 



Larva cylindrical, rather plump, shining pale glaucous or 

 almost yellowish white, with a darker dorsal vessel ; head 

 deep shining black ; dorsal plate blackish brown ; anal plate 

 pale brown ; feet pale green. 



August to October and after hybernation from April to 

 June, on wild cabbage (^Brassica oleracca), in the side shoots 

 and stems eating out the pith, forming a burrow of a few- 

 inches in length, and then moving to another shoot, thrusting 

 out its excrement through a hole in the side of the shoot. 

 Assuming the pupa-state in the larval burrow. 



The moth flies swiftly in the sunshine, about the wild 

 cabbage, on the cliffs and rocky slopes on which that plant 

 grows. Exceedingly local in these Islands, and, so far as I 

 can ascertain, confined to the coasts of Kent and Dorset. 

 Abroad it inhabits France, Italy, South-west Grermany, 

 Hungary, Dalmatia, Bithynia, and Northern Africa. 



5. S.cognatana,^«rr. — Expanse i to finch (12-1 6mm.). 

 Fore wings dull smoky black with a curved, white, pointed, 

 tooth-like dorsal spot, beyond which a pale transverse line 

 bends outward towards the anal angle. 



Antennae black-brown ; palpi, head, thorax, and abdomen 

 dull black-brown. Fore wings moderately broad, costa 

 gently arched, apex bluntly angulated, hind margin straight 

 and very little oblique ; dull smoky black or olive black ; in 

 the middle of the dorsal margin is an erect, curved and 

 almost hooked, pointed white spot or blotch ; opposite to it 

 is the first of four pairs of slender white costal streaks ; the 

 second of these pairs is lengthened so as to form the usual second 



