248 LEPIDOPTERA. 



the way; hind margin occujiied by a broad band of still 

 blacker slate colour, often divided by pale nervures ; cilia 

 concolorous with it. Hind wings silky white ; at a short 

 distance from the base, and near the costal margin is a small 

 slate-black spot ; beyond the middle an irregular, often 

 broken, transverse stripe, and along the hind margin another 

 broader and more even, both these stripes or bands are of the 

 same dark colour, and both much divided by pale nervures ; 

 cilia black at the base, tipped with white. Female similar. 



Undersides of all the wings exactly as on the ujjper sides. 

 Body yellow, barred with black ; legs slate-grey. 



Usually constant in colour and markings ; but occasional — 

 rare — sjjecimens have been taken in gardens in South London, 

 in which the two outer bands, on both fore and hind wings, 

 are united, and even more blackened, until the wings are 

 quite one-half black. One such was taken a few years 

 ago by Mr. R. Adkiu at Lewisham, and I took another at 

 Nunhead — also an intermediate example. 



On the wing from June till August. 



Larva smooth and semi-transparent, rather shining ; head 

 black, with three white spots on the face ; body whitish- 

 ochreous, dark green on the back, with a double, pale green, 

 whitish, or yellowish dorsal stripe, divided by a green line ; 

 dorsal plate horny, having a black spot on each side ; the 

 usual raised dots and spiracles black, very minute. 



Or — Uuicolorous bright pink, or pale carmine; under- 

 surface paler; head black with three pink spots on the face, 

 the middle one larger and elongated ; the usual black spots 

 on the dorsal plate. 



When young pale bone colour, with a bright green dorsal 

 line. (Chas. Fenn.) 



August till September or October, on nettle (Urtica 

 dioica), also occasionally on Stacliys sylvatica, Marrubium 

 mdgare, Mcntltn, and many other Labiate plants, both wild 

 and cultivated ; living in a drawn-together, or rolled, leaf. 



