88 BRITISH BUTTERFLIES. 



by a set of spiral lines, giving a very trachea-like appearance, the lines 

 being at an angle of about 60° to the axis of the hair. The segments 

 separate rather easily, and, in doing so, display a nearby structureless 

 intersegmental membrane, except in the case of abdominal. incision 

 4-5, where it is covered with fine points, almost spicules, 

 showing that this incision is probably capable of a certain amount of 

 movement in the living pupa. [Described from an empty pupa-skin.] 

 (Chapman). About 8'5mm. long, of fairly uniform thickness ; the head 

 truncated in front, the thorax slightly swollen dorsally, the abdomen 

 rises at the base and falls away in a gentle curve to the anal extremity, 

 which is bluntly terminated. The entire surface is a pale green, and 

 very finely reticulated ; the wing-cases are rather whiter-green than 

 the rest of the body, with whitish neuration, and irregularly sprinkled 

 with minute black specks ; a mediodorsal line composed of a series of 

 black marks and specks, runs the entire length, and forms a well- 

 defined line over the head and thorax, but becomes broken up into a 

 series of spots on a darker ground stripe along the abdomen ; a supra- 

 spiracular series of small black dots, one on each of the 3rd, 4th, 5th, 

 and 6th segments, and a large, somewhat oval black blotch on the 1st 

 abdominal segment, and two others, one at the base of the wing on the 

 mesothorax, another on the metathorax, also a small spot on the pro- 

 thorax; all these, and a few other tiny specks, sparingly sprinkled over 

 the body, are black. The whole surface, excepting the wings, sprinkled 

 with slightly curved, moderately long, white, serrated hairs, each with 

 a swollen base ; a few fine white bristles near base of wings, terminat- 

 ing in a cluster of much finer bristles. The spiracles are whitish and 

 prominent (Frohawk). The pupa is 4-J lines long, rather slender, 

 yellowish-brown, dotted with brown, with a black-brown dorsal line, 

 and a strong black-brown dot on each side of the 1st abdominal seg- 

 ment ; thorax and abdomen with many pale yellow or whitish bristles, 

 thickened at their bases. The strong spot-like point lies near the margin 

 of the wing-cover, and the girth runs beside it. The succeeding seg- 

 ments also have a dot, but much smaller, and less conspicuous, and well 

 above the spiracles. The wing-cases are without bristles ; the brown 

 dots are thick, and arranged in longitudinal stripes, which are separated 

 by paler lines. The bristles of the thorax are whitish, the rest 

 yellowish, longer, and somewhat curved. On both sides of the head, 

 the bristles stand crowded together almost in tufts (Zeller). 



Variation of pupa. — Edwards notes (Can. E)rt., viii., pp. 202 et 

 seq.) a difference in the colour of pupaa of the form comyntas accord- 

 ing to the foodplant of the larva?. He says that a larva fed on 

 Desmodium. was green, and its pupa was green ; whilst larvae fed on 

 clover were red and the pupaa sordid-white. He describes them as 

 follows ; — 



(1) Length -26in., greatest breadth *10in. ; shaped much like the mature 

 larva, rounded at each end, tapering on the sides somewhat from segments 5 and 

 6 to head, roundly carinated dorsally, flattened on underside ; the mesonotum but 

 slightly prominent ; colour emerald-green ; a dark green medio-dorsal stripe from 

 end to end, and on either side of this a row of small round black spots, nearly the 

 whole length ; much covered with fine white hairs ; on the top and sides of the 

 anterior segments the hairs are conspicuously longer, and are arranged in tufts, 

 and similar hairs form a connected fringe quite round the abdomen. 



(2) Sordid-white on the whole upper surface and lower side of abdomen, the 

 former speckled with brown ; the medio-dorsal stripe brown, as also the dots ; 



