24 OHEQUEBED WHITE. 



also more near Deal, one at Kingsdown, one near Walmar, and another 

 at Tenterden, in the same county. My excellent friend, J. C. Dale, 

 Esq., has also recorded the capture of one about the same time near 

 Bristol. One was taken at Keynsham, between Bath and Bristol, and 

 one at Whittlesea, in Cambridgeshire, in 1853, by E. Burton, Esq., of 

 Spekelands, near Liverpool. One near Lewes, Brighton, and four near 

 Horndean, Hampshire. 



Two broods occur in the year, the earlier one in April and May, 

 and the latter in the end of July and August. 



The caterpillar feeds upon wild woad, base-rocket, and wild cabbage, 

 as also on various species of Reseda and cruciferous plants. 



It is described by Boisduval as being of a bluish ash-colour above, 

 and on the sides covered with small black raised dots, and four white 

 stripes along the sides ; beneath, whitish, as are the legs, each with a 

 yellow spot above it. 



The chrysalis is greyish, dotted with black, with several reddish 

 stripes. 



This fly varies in the expansion of its wings, from not quite an inch 

 and three quarters to nearly two inches. The wings are white, with 

 a shade of cream-colour. The fore wings, which are unusually pointed, 

 the outer margin being slightly concave, are blackish at the base, and 

 there is a rather large black spot about the centre of the wing, where 

 the transverse veins appear of a white colour. The tip is irregularly 

 marked with black, irrorated with white, which is widest towards the 

 front margin j the black patch is also marked with four irregular white 

 sfjots. The hind wings are white, the markings of the under side 

 shewing faintly through. 



Underneath, the marks of the fore wings are of a greenish colour, 

 and there is a spot on the inner edge. The hind wings are yellowish 

 green, with three large white spots, forming a triangle, towards the 

 outer corner of the wing, succeeded by an irregular white bar beyond 

 its middle, crossed by yellowish veins, and with five white club-shaped 

 spots on the outer margin. 



In the female the black patch on the fore wings, which are of a 

 convex and rounded form, is darker than in the male, and there is 

 another small black patch near the inner margin. The hind wings 

 are white, but the markings of the under side shew through rather 

 more distinctly than in the male, especially along the outer edge. 

 Underneath they are greenish, and marked as in the male. 



