278 BRITISH BUTTERFLIES. 



two pairs transversely, each pair occupying the site possessed by the 

 legs on the metathorax. The 2nd abdominal is similar, except that 

 there is sometimes only one (the anterior) lenticle on the flange. 

 This second flange lenticle on the 2nd abdominal is an inconstant 

 quantity, a larva will sometimes have it on one side but not on the 

 other side of the body ; in fact, a larva commonly has one or two 

 normal lenticles missing. The lenticles on the 3rd to the 8th 

 abdominals are similar, that is, on the 1st subsegment a dorsal pair, 

 on the 2nd subsegment one above the spiracle, and one below on 

 the flange, six in all. The 9th abdominal has the same number. I 

 believe the 10th abdominal has a pair of dorsal lenticles, and there is 

 one lenticle on the outer wall of each of the anal claspers. On each 

 anal clasper, above the hooklets, on the posterior wall, is a large orange 

 tubercle, terminating in a blunt point without any seta. The anal 

 claspers have two or three rows of hooklets, but the circle is not 

 complete, there being a gap in the outer posterior quadrant. Beneath the 

 anal flap the teeth of the anal comb are visible. The skin of the larva 

 is everywhere covered with small, blunt spicules, and also bears a fairly 

 thick coating of small, dark tubercles, each crowned with a short, stout, 

 sharply pointed seta. These secondary tubercles are more numerous 

 along the ridges of the subsegments and the flange, and also around 

 the claspers. They are of two sizes, the smaller bearing a seta about 

 O06mm. long, and the larger a seta about O'lmm., but there are also 

 intermediate sizes. As in the 4th instar, there are, among these larger 

 tubercles, some which I believe to be primary tubercles, of which I think I 

 can distinguish i, ii, and possibly iv (Sich). Final instar (fullgrown): 

 About 23mm. long and 4mm. wide from about the 2nd- 5th abdominal 

 segments. The larva is fusiform, tapering similarly to both ex- 

 tremities, with the exception that the head is added to the anterior 

 extremity. The head is about 2-8mm. across and 2'7mm. high, 

 measuring into the notch dorsally, but 3-0mm. if measuring the 

 lateral eminences; whilst the "neck" is only l*8mm. wide and 

 l-7mm. high. The colour is green, overlaid with a brownish tint, 

 which gives a dirty-olive colour, most marked in front, least about the 

 middle segments. The head is deep brown, with paler(terra-cotta) in certain 

 regions, but varying in amount, and shading into the ground-colour; on 

 either side is a large patch on the vertex, one laterally, and two beside 

 the clypeus, one about the centre of the face, the other lower. The 

 labrum and jaws darker. The spiracles dark brown, a green dorsal 

 line (dorsal vessel) and a pale line half-way between this and the spiracles. 

 The head is rough with minute raised ridges ; it is covered with 

 hairs, mostly very short (ochreous) ; each of these arises from the 

 bottom of a pit, or from a slight eminence at the bottom of the pit. 

 These pits are closely crowded together, and are of slightly varying 

 sizes, and slightly varying closeness, so that the ridges between them 

 are only approximately circles and parts of circles, and are always 

 rather sharp ; these are the ridges that make the head so rugged in 

 surface; they form an excellent defence against the hairs being rubbed 

 off. The legs are pale ochreous, the prolegs green, as the rest of the skin. 

 The segments present a marked flange some way below the spiracle, 

 and a rounded boss on each segment (3rd member of lateral flange) 

 just above prolegs. There is no trace of an upper lateral flange at 

 spiracular level. The segments are markedly divided into subsegments. 



