PAPILIONID.T,. — rONTI,V. 23 



On the continent this insect is double-brooded, its first appear- 

 ance being about the end of April or the beginning of May, and 

 the second about the middle of August ; but the rarity of this 

 species in Britain has hitherto prevented entomologists from cor- 

 rectly ascertaining whether such be the case in this country, though 

 it must be presumed that is the fact, as the only recently recorded 

 examples were captured in May and August, the first by Dr. Ab- 

 bott — as stated in Lepidoptera Britannica — and the last by myself, 

 on the 14th of August, 1818, in the meadow behind Dover Castle; 

 and, unless greatly deceived, other specimens were at that time 

 previously observed by me, but mistaken for dark females of Po. 

 Napi. At the period last-mentioned, Mr. Dale informs me that a 

 specimen was taken near Bristol. It was taken, according to Ray, 

 by Petiver, at Hampstead, and by Vernon at Gamlingay, in Cam- 

 bridgeshire, and it has also occurred near Bath. 



Sp. 9. Cardamines. Alis alb'is, anticis utr'mquc hinuld media nigrAy 

 maris ad apicem fulvis, posticis suhtus lutco-viridi nebulosis. 

 (Exp. alar. 1 unc. 4 lin. — 2 unc. 1 lin.) 



Pa. Cardamines. Linne. — Lewin, pi 30. — Po. Cardamines. — Steph. 

 Catal. 



The upper surface of all the Avings in both sexes is white, witli the base dusky ; 

 the anterior with a black lunule, which is usually very small in the male, in 

 which sex they are adorned with a deep fulvous spot, extending from the 

 lunule to the tip ; the tip itself is dusky, or black, its posterior edge inter- 

 rupted with black and yellowish : the posterior wings have a few dusky spots 

 on the edge : beneath, both sexes have the anterior wings white, with a white 

 lunule in the centre, a few black dots on the costa, and the tip varied witli 

 greenish yellow : the male has the base slightly tinged with sulphur, and a 

 deep fulvous spot towards the tip, correspontling with that on the upper sur- 

 face : the posterior wings in both sexes are alike beneath ; tliey are white, 

 prettily marbled with green and yellowish, the latter colour predominating on 

 the nervures : the body is black above and white beneath : the antcnniv are 

 white, annulated with brownish. 



Var. /?. Both sexes with a black spot on the upper surface of the posterior 

 wings. 



Var. y. Both sexes with the black lunule on the upper surface of the anterior 

 wings nearly obliterated. 



Var. I. Female with a V-shaped greenish-yellow spot on the under surface of 

 the anterior wings, placed between the hniule and the thinner margin. 



f Var. i. Male .? with the fulvous spot nearly obliterateil. This variety, which 

 is in Mr. Haworth's collection, is probably an hermaphrodite. 



The caterpillar is green, with a white longitudinal stripe placed above the legs ; 



