336 BRITISH BUTTERFLIES. 



(iii.) are both short, the anterior one curving forwards, the posterior 

 one backwards ; below the spiracle, which is black, are three brownish- 

 coloured serrated hairs (iv., v. and vi.) placed in triangular form ; all 

 projecting laterally, and all with dark bases ; the central one very long; 

 below these, on the first lateral lobe of each segment, a simple white 

 hair (vi.) ; two other very similar ones on the base of each proleg (vii.). 

 The whole surface of body densely sprinkled with blackish points, 

 giving it a rough appearance and adding to the appearance of the depth 

 of the segmental incisions. The legs and prolegs similar in colour to 

 the body (Frohawk). Head black ; body colourless, but the intestinal 

 canal, filled with an orange-coloured substance like the yoke of a 

 duck's egg, plainly perceptible. Each segment of the body emits a few 

 scattered hairs; these are particularly observable near the anal 

 extremity (Newman). When full-fed in this instar pinkish brow 7 n 

 (Buckler). 



Second instar; About *16 in. in length, stout, tapering towards head, 

 which is much smaller than the prothorax. General colour dirty pink. 

 Head brown and shining. Behind the head is a large almost plate- 

 like dull black mark, from which extends the rather broad, conspicuous, 

 rust-coloured dorsal line. Body sparingly clothed with light brown 

 hairs (Porritt). -083 ins. long; the first and last segments are flattened, 

 projecting and rounded, overlapping the head (which is withdrawn 

 while at rest), and the anal claspers. The body is much arched, 

 having a medio-dorsal ridge considerably elevated ; the sides are 

 flattened and sloping to a lateral ridge ; the under surface is also 

 flattened, the ground colour is of a pearly white, thickly studded w 7 ith 

 very minute blackish points ; and scattered over the whole surface are 

 a number of bristles, varying in length, all having bulbous dark shining 

 brown bases ; the longest are situated on the dorsal and lateral regions ; 

 the spiracles are shining dark brown ; the segments are beautifully 

 marked with purplish pink, forming longitudinal stripes, the most 

 conspicuous being the medio-dorsal and lateral stripes; the three other 

 stripes, two above and one below the spiracles, are made up of oblique 

 markings. The head and prolegs are brown, and the claspers whitish 

 (July 22nd, 1896). 



?TJiird instaT*: -125 in. long, similar in colouring, pattern, and 

 structure, excepting that it is brighter, and the hairs a good deal longer, 

 and the head is shining black. (Another larva July 22nd, 1896). 



^Fourth instar (the large larva above moulted July 26th). Still 

 measured -125in. when fully extended (20 hours after moulting). The 

 general colour now more uniformly ochreous-pink and duller; the second 

 and third segments are humped ; the first segment is sloping to the 

 front, sunken in the middle and rounded, overlapping the head, and 

 it has a large black oval patch in the centre: the three posterior 

 segments are also compressed and sunken ; each segment is humped 

 sub-dorsally, forming a deep longitudinal medio-dorsal furrow, the 

 sides are concave, and the lateral ridge projecting and overlapping the 

 entire length, hiding from view T the legs and claspers; there are four 



* As Mr. Frohawk only notes looking at the larva) (which hatched on July 

 10th) on July 13th, 14th, 18th, 22nd, 1896, and apparently made no observation on 

 the moulting ; it appears probable that these were assumed to be in different stadia 

 merely on account of tbe difference in size. Porritt gives the length in second 

 instar as lin. 





