S-1141001_COMPLETO.pdf

30 WOOD WHITE.
and Sarum, Wiltshire, as J. W Lukis, Esq. has informed me;
Raydon woods, near Hadleigh, Essex, as R. 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 Lathyrus,
Lotus, and Orobus; the Vetch, Vicia cracca, and, according to
Fabricius, the Sinapis, 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.