206 BRITISH BUTTERFLIES. 



darker brown ; the ocelli transparent, placed on two black lunules, one 

 on each cheek, five ocelli being arranged in an arc on the side nearest 

 the mouth, a sixth being separate, and placed by itself on the side of 

 the cheek remote from the mouth. The head is sprinkled with a 

 number of glassy-looking hairs ; it is quite retractile within the pro- 

 thoracic segment, but is extended to some distance beyond the pro- 

 thorax when the larva is attempting to find a crossing from one leaf 

 to another. Thorax : The front edge of the prothorax is also studded 

 with glassy-looking hairs, similar to those on the head, but further 

 back (dorsally) the prothorax is covered with short, black, curved 

 bristles. The segment itself is very extensible, and stretches consider- 

 ably when the larva is actively moving. The true legs are very pale 

 and glassy, well sprinkled with long glassy hairs, and terminated by a 

 dark brown inflexed hook. The meso- and metathorax are flattened 

 dorsally, although the segmental incisions are very deep, and there is 

 a gradual rise from the head to the 2nd abdominal segment. Abdomen: 

 The 2nd to 6th abdominal segments bear a double ridge of raised dorsal 

 serrations, the raised points decreasing in size on the 5th and 6th 

 abdominal segments. These are distinctly separated by the deep 

 segmental incisions, and by the fact that they do not extend so far 

 forward as the first subsegment of each segment. The apices of 

 these raised projections are edged with purplish-red internally, 

 and yellowish externally, and are well-supplied with purplish-red 

 hairs. The spiracles on the 1st to 8th abdominal segments are 

 very minute, scarcely to be detected by the naked eye, but, under 

 a moderate power, each shows as a dull, orange-coloured, cup-shaped 

 hollow, with a brownish rim. Just above the spiracles, a subspiracular 

 line is to be traced, slightly paler than the ground colour. This line, 

 under good magnification, is found to be studded with minute glandu- 

 lar-looking warts, the "lenticles," probably the traces of supraspiracular 

 tubercles, a few similar warts, " lenticles," occupying the position of the 

 prespiracular tubercles, but they are all quite smooth, and bear no hairs, 

 although the skin is plentifully supplied, both laterally and dorsally, 

 with short brown hairs. These are particularly abundant on the 

 hinder abdominal segments, and, on the posterior edge of the anal 

 segment, the black hairs are much longer than elsewhere, and 

 form a dense fringe, which is even visible to the naked eye. The 

 prolegs are retractile, exceedingly pale, and terminated by a broad 

 flange, covered with short, and apparently weak, pale brownish, 

 hooks, while the joints of the prolegs are supplied with long, pale, 

 glassy-looking hairs, like those on the true legs (Tutt). In the last 

 instar the larva has next to no brown left, but has combinations of 

 green, yellow, and pink, varying much in different specimens, that 

 give the larva many most pleasing colour schemes. One handsome 

 specimen noted is green, with yellow dorsal ridges, in which the yellow 

 is hardly seen, owing to the outer margin being white on the 2nd, 3rd, 

 4th, and partly 5th, abdominal segments, and the inner margin bright 

 rose-pink. The oblique lines in this specimen are less pronounced. 

 The red (or pink) is mediodorsal on the mesothorax, and suffused 

 along the sides and along the tops of the 7th-10th abdominal segments. 

 In others, the whole dorsal area is suffused pink, and some might almost 

 be called red rather than green. The head is pale green, with very 

 black eye-spots and pink labrum. The dorsal ridges are well apart 



