178 BRITISH BUTTERFLIES. 



other lenticles are rather larger, some are rather oval and a good many 

 are a little irregular in outline, and more have a peculiar varia- 

 tion. In all, the chitinous ring has a darker outer margin and a pale 

 inner half, not fading into, but sharply demarcated from, the drum- 

 like membrane. In these specially varied specimens, this inner pale 

 portion of the ring sends into the middle of the ring finger-like pro- 

 cesses, sometimes only amounting to a slight angulation of the 

 margin, in others reaching to the middle of the ring ; there may be 

 one or more of these, one is observed to have one long one of these 

 and six others of various lengths, besides two or three angulations. 

 On the metathorax are three lenticles on each side, at ?bout the 

 situation of tubercles i, iii and vi, really about an equidistant distribu- 

 tion ; on the mesothorax, however, the middle one of these (iii ?) is 

 absent and its place occupied by a very long slender hair, a hair nearly 

 0'5mm. long. On the abdominal segments is one dorsal lenticle (i?) 

 and one below spiracle (v ?) and a nearly ventral one (vii ?) ; the low T est 

 of these (vii ?) is absent on the segments with prolegs ; the 8th and 9th 

 abdominals are not clear in the preparation, but seem to have a 

 slightly different arrangement. The anal plate carries on each side 

 three hairs marginally and one (at least) higher up. These are strong 

 thick bristles 04mm. to 05mm. long, and not such slender filaments 

 as that on mesothorax. Beneath the anal plate is an anal comb about 

 0'36mm. long and O30mni. wide, divided into fifteen tines, which are 

 all of about equal length, and are distinguishable from each other right 

 to the base, but united side by side except just at their tips. The anal 

 claspers are about l-4mm. across, form nearly four-fifths of a circle, and 

 possess about 120 hooks, apparently all in one row, but on one side 

 (inner) of three sizes, looking much as if in three rows, and on the other 

 side in two sizes similarly disposed. The ventral prolegs are practically 

 complete circles, of about seventy hooks, also in three sizes, but less 

 regularly placed as one of each together than in the claspers, so that 

 they look for the most part as if of two sizes. They appear to have 

 very little, if any, pedicel, though on their outer aspects are six or 

 eight genuine bristles, about O'lmrn. long. The only other positions in 

 which genuine bristles occur are (1) one or two near the subspiracular 

 lenticle and (2) one or tw r o (together) halfway between this and the prolegs. 

 The skin is covered with fine and very sharp skin-points, apparently 

 hard bits of chitin, seen in plan more or less irregularly quadrangular, 

 but in profile triangular, the free apex being a very sharp right angle. 

 They are about O005mm. from point to point. The most notable 

 feature of the larva is its complete covering of secondary hairs. These 

 are minute and very numerous, perhaps 0-03mm. to OOGmm. long, and 

 about 100 to 1 sq.mm. of surface. They vary a good deal in detail 

 of structure, but may be classed as trumpet-hairs ; they each have a 

 raised thimble-like, or bell-shaped, base, to which is centrally articulated 

 the hair, which is inversely conical, expanding (not in a curve but) 

 in straight lines to its apex, the apex being two to three times as wide 

 as the base. They appear to be cups, that is, the centre looks hollow 

 and open at top, the margin terminates m a row of very sharp, saw-like 

 teeth, sometimes directly, at others after a slight gathering in of the 

 margin. The head is rounded (about 3-5mm. across ?, it is split up 

 and the measure is doubtful), black, with a paler line down to clypeus, 

 due to thinner chitin. The clypeus has similarly two lateral and two 

 median paler lines, and carries a few bristles similar to those of proleg 



