AND THEIR TRANSFORMATIONS. 2 
SPECIES 7.—PIERIS DAPLIDICE. THE BATH WHITE BUTTERFLY. 
Plate vi. fig. 6—10. 
Synonymrs.—Papilio (Dan. Cand.) Daplidice, Linn. Syst. Nat. Pieris Daplidice, Schrank, Latreille, Boisduval, Zetterstedt. 
ii. 760. Lewin Brit. Papil. pl. 28. Donov. Nat. Hist. Brit. Ins. Sunchloe Daplidice, Hubner (Verz. bek. Schmet.). 
6, pl. 200. The Slight greenish Halfmourner, Petiver Pap. pl. 2, fig. 8, 
Pontia Daplidice, Fabricius, Ochsenheimer, Steph. H]., Curtis | male. 
Brit. Entomol. pl. 48. Vernoun’s Greenish Halfmourner, Petiver Pap. pl. 2, fig. 9, 
Mancipium Daplidice, Stephens Nom., Duncan Brit. Butt. pl. | female. 
9, fig. 2: 
This very rare butterfly varies in the expansion of its wings from an inch and two-thirds, to nearly two inches. 
The wings are of a white colour, those of the males being rather more cream-coloured. The upper side of the 
fore wings is blackish at the base, and is marked with a rather large, discoidal black spot at the extremity of 
the discoidal cell, in which the transverse veins appear of a white colour. The apex of these wings is irregularly 
biack, the dark colour being broadest towards the front margin, extending only to the middle branch of the 
mediastinal vein, and being irrorated with white, having also four irregular white spots in the black patch, 
which is darker in the females than in the males; the females have moreover a small black patch near the 
inner margin of the fore wings; the upper side of the hind wings is white, but exhibits traces of the marking 
on the under side, in consequence of their slight transparency: indeed in the female, these traces are more or less 
distinctly marked with black scales, especially along the edge. On the under side the markings are alike in both 
sexes, the male having the spot on the inner edge of the fore wings, which is wanting on the upper side in this 
sex. The marks of the fore wings on the under side are of a greenish colour. The under side of the hind 
wings is yellowish-green or greenish (in some females), with three large white spots forming a triangle towards 
the outer base of the wing, succeeded by an irregular white bar beyond the middle of the wing, traversed by 
yellowish veins and with five white clavate spots on the outer margin. The male moreover differs from the female 
in the form of the fore wings, which are more acute at the apex than in any other species of this genus *, and 
with the external margin slightly concave, instead of being convex, as in the female. This remarkable sexual 
difference, hitherto I believe unnoticed in this species, occurs as we have seen, but in a less striking degree, in 
P. Napi and Sabellice. The caterpillar, which feeds upon various wild Resedacee and Cruciferw, such as 
wildwoad, base rocket, and cabbage, is, according to Beisduval, of an ashy blue colour, covered with small black 
granules, with four white longitudinal stripes, marked at each incision with a lemon-coloured spot. The belly 
and legs are whitish, with a yellow spot above each of them. The chrysalis is greyish dotted with black, with 
several reddish stripes. Our figures of the larva and pupa (carefully copied from Hubner) differ in their colours 
from the individuals described and figured by Boisduval in his ‘ Collection Ieonographique des Chenilles d'Europe.’ 
On the Continent, two broods of this insect appear in the course of the year +. It is found in dry and sandy 
situations, and is very common, especially in the more southern part of the continent of Europe, as well as in 
Barbary, Asia Minor, and Cachmere. In this country it is very rare. According to Ray, it was formerly taken 
by Vernon near Cambridge ; and Petiver records it as having been taken near Hampstead. Lewin informs us 

* Notwithstanding this circumstance, the species is placed by Stephens at the head of his section division of Pontia, characterised by having 
“the anterior wings distinctly rounded at the tip,’’ in contradistinction from the typical species, P. Brassica, &c., in which they are described 
as “obtusely angled.’’ 
+ In April and May and afterwards in August, according to Godart; but Boisduval gives April and May, and June and July, as the time of 
its appearance. Mr. Stephens captured his specimen however in the middle of August. 
