364 BRITISH BUTTERFLIES. 



present), and the 7th and 8th abdominal segments have a lenticle in 

 place of ii. The anal plate is small and square (about 0"07mm.) with- 

 out hair or lenticle ; seven or eight hairs on either side (three long) 

 belong to the 9th and 10th abdominal segments. The lenticles are, 

 those already noted on prothoracic plate and mesothoracic dorsum, 

 one on metathorax between tubercles ii and iii, corresponding 

 apparently with the upper and larger and anterior of the two that 

 occupy this position on abdominal segments 1, 2, 8, and 4 ; on 5 they 

 are usually the same but, on one side of one specimen, they are as on 

 the 6th abdominal. The upper front one is wanting in the position it 

 has on other segments, but appears to have retreated to the posterior 

 border of segment ; on the 7th and 8th abdominals they are absent, 

 but a lenticle occupies approximately the site of ii, it may represent 

 ii, or that hair may be absent and this may be one of these lenticles ; 

 the space between i and the spiracle is reduced in these segments, very 

 much so on the 8th abdominal ; the further lenticles are — one in front of 

 the prothoracic spiracle, one accompanying the lateral flange-hairs on the 

 1st abdominal, and one replacing a marginal hair on the 7th abdominal. 

 The spiracles are amazingly elaborate structures; they present an inner 

 and outer ring, connected together by elaborate columns, the inner 

 ring also with a radiate structure of similar character. Each proleg 

 has the usual two pads, each with a larger and shorter hook ; 

 the anal claspers are the same except that the anterior smaller hook is 

 wanting. The general surface is covered with skin-points, which, 

 according to focussing, appear pointed or square. There is no trace 

 of honey-gland or fans. Second instar : Barely 2mm. long, thick and 

 stumpy, hardly thicker in front, and both ends rather truncate, as seen 

 from above ; seen from the side, the top slopes gradually backwards 

 from the 3rd thoracic to the 6th abdominal, then more rapidly ; seen 

 endways from the front, it has a flat top, two slopes, and an under- 

 surface that is not, however, flat, but rises a little on each side to the 

 lateral flanges, the top about half as wide as the slopes are high and 

 with a crest of hairs along either side of the top, quite a haze along 

 the marginal flange, with a row of shorter hairs, halfway up the slope; 

 seen endwise, there seems to be no channel between the dorsal ridges, 

 i.e., the dorsal ridges are merely the rounded angles where the dorsum 

 and slopes meet ; seen laterally the segments stand up with a deep 

 sharp groove at the incisions, each being surmounted with a set of black 

 hairs, principally one (i ?) standing erect, with a slight backward 

 curve, a smaller one behind (ii ?), and a still smaller in front; other 

 hairs (those of other side, etc.) support, rather than confuse, these. 

 The colour is a dull dark olive-grey with yellow down the dorsal ridges 

 in little patches, one patch to each segment ; the lateral ridge also has 

 a paler, yellowish, move continuous line. [Several weeks ago, when 

 the larva was undoubtedly feeding, its colours were brighter, it was 

 then a dark green, with very distinct yellow lines.] Hallway up the 

 slope, occupying about its middle third, is a darker band, consisting of 

 a patch on each segment, edged obliquely (downward and backward) 

 by paler (yellowish), both above and below. The head is very black 

 and polished ; the legs pale. When one tries to get a grasp of the 

 arrangement of hairs and lenticles, one finds that there is a consider- 

 able amount of variation between different segments and between even 

 the two sides of one segment, that there is, in fact, already, some 



