viKias. 
33 
Larva. — Dark greyish bine spotted with black ; on each 
segment are four longitudinal stripes, marked with a light yellow 
sjjot. The spiracles are bluish white. The head is the same 
colour as the body, marked on each side with a yellow spot. The 
chrysalis, which passes the winter fastened to the rocks, is grey, 
finely powdered with black, and with a yellow line on the back 
(Boisduval, Species Gen. de Lepidopt. i. 542). The larva feeds on 
alpine Cruciferce. There are no European varieties of this species, 
but Herrich- Schaffer figures a variety called Cknjsidice, which occurs 
in Asia Minor and the North of Persia. It differs from the type in 
having the under side of the hind wing of a deeper green, and with 
the marginal patches square, instead of in the form of arrow-heads. 
7. P. Daplidice, Linn. Syst. Nat. x. 468 ; Hilb. 414-5, 777-8; 
Err. 533. 
Expands 1’50 to 1’80 in. Wings white, marked with black 
and grey above ; the hind wings having a chequered pattern of 
green beneath. The tip of the fore wings is black in both sexes, 
divided by four small white spots, each one sending an elongation 
into the marginal fringe ; at the extremity of the discoidal cell is 
a black spot, in which the discoidal nervure appears as a fine white 
line ; this black spot is narrow in the male, large and square in the 
female ; the latter has also a black spot of a round or lunar shape 
near the hind margin. The hind wings are white and unspotted 
in the male, showing the pattern of the under side through. In 
the female they have a black border formed of crescentic patches, 
with the convex edge inwards, and divided by black dashes. 
Under side : — Pattern of the fore wings the same as above, except 
that the border of the tip and hind margin is powdered with green 
scales, also the discoidal spot ; the base of the wing is tinged 
with greenish yellow, and there is a black spot near the inner 
margin in both sexes. Hind wings green, with a slight tinge of 
yellow, and finely powdered with black scales ; on this ground- 
work there is an arrangement of white spots, disposed as follows : — 
Two or three irregularly placed near the base of the wing ; outside 
those a row forming a band ; and again, external to these, a 
marginal row of five spots, oval or nearly quadrate. 
F 
