30 WOOD WITTTE. 



and Sarum, Wiltshire, as J. W. Lukis, Esq. has informed me; 

 E.aydon woods, near Hadleigh, Essex, as E,. M. Postans, Esq. 

 has informed me; and very abundantly in all the woods in the 

 neighbourhood of Ardrahan, in the county of Galway, in Ireland, 

 as I have just learned by an obliging communication from A. 

 G. More, Esq., of Trinity College, Cambridge. 



The caterpillar feeds on the different species of Lathijrus, 

 Lotus, and Orohus; the Vetch, Vicia cracca, and, according to 

 Fabricius, the Sinajxis, or wild mustard; but this is now said 

 not to be the case, so that the specific name thence given to 

 it has been altered. 



This fragile-looking Butterfly measures from one inch and a 

 half to nearly two inches across the wings. It is of a delicate 

 white colour, with a rounded dull black spot at the tip of the 

 fore wings. In some specimens, however, this spot is nearly 

 obliterated, and in others is entirely wanting. 



Underneath, the fore wings have the front margin greyish- 

 coloured, and the base and tip of these wings very pale yellowish 

 green. The hind wings are tinted very faintly with greenish 

 yellow, with the nerves, and two irregular, and in many instances 

 interrupted, transverse bars, of a greyish ash-colour. 



The female resembles the male. 



The caterpillar is green, darker near the end, and with a 

 yellow stripe along the sides, above the feet. 



The chrysalis is at first of a greenish yellow colour, but 

 afterwards becomes whitish grey, with red dots on the sides 

 and upon the wing cases. 



