290 BRITISH BUTTERFLIES. 



quite ventral, in the usual Lycaenid larval form. Hairs, though long, are 

 fine and inconspicuous, the dorsal crests rise between dorsal and sub- 

 dorsal lines. In this (second) instar, theprothoracic plate has lost the 

 two front small hairs, the forward pair of long hairs being replaced by a 

 pair of lenticles, making four lenticles ; the posterior pair persist, and 

 the special (angular) pair are now characteristic. On the mesothorax 

 is a large high central (azygos) lenticle, with three (one unpaired) 

 dorsal hairs in front of it, then the setse of i and ii (?) with an accessory 

 hair behind, then one long and two short hairs, and then a lenticle, 

 quite in line with, and looking like, a spiracle, then nine hairs (flange 

 series) and a lenticle, and five or six hairs (marginal series). The 

 metathorax is the same, except that it wants the dorsal lenticle, but 

 has one just outside i and ii. Taking the 2nd abdominal as typical of 

 the abdominal series, there are — the setse of i and ii ; internal to i, 

 and in front of it, a short hair, and another external to 

 it ; then two short hairs, very like the two short hairs 

 (iii ?) of first instar, but between these and spiracles are (1) a 

 large hair directly above spiracle (iii ?), (2) a short hair in 

 front of the two large lenticles, and behind it ; below the spiracle, 

 five or six flange-hairs (about 025mm. long), and, on marginals, 

 a lenticle and three or four hairs. The hair-bases show only a trace 

 of a crown (or star) of spines, but the lenticles generally show them as 

 marginal irregularities. Lenticles are more abundant on the 7th, 8th, 

 and 9th abdominal segments. The honey-gland is indicated, but the 

 fan is not clearly made out. Each pad of prolegs and claspers shows 

 a larger and smaller hook. Third instar (before hybernation, August 

 26th 1907) : The head is black ; the prothoracic plate square (with 

 angles front, back, and lateral), the front angle rounded, the posterior 

 with a short, backward, square prolongation ; it is outlined black, with 

 black hair-bases and lenticles. Each segment has a row of black dots 

 along front and back margin, meeting near the dorsum, and joining a 

 group about the spiracles ; some of these are hair-bases, some lenticles. 

 The hairs are colourless; those of tubercles i and ii may perhaps be 

 recognised, also one above spiracles, and several marginal ones. The 

 larva still has the same three reddish lines as in the preceding instar, 

 of which the intermediate one is sufficiently zig-zagged to make it 

 clearly belong to the oblique series. None of the larvae has definite 

 dorsal flanges ; they are, in fact, very rounded when fat, a little 

 flattened below when small, in this instar. Third instar (after hyber- 

 nation, April 14th, 1908): 4-4mm. long. The head is black, polished. 

 The body of a green just matching the clover-leaf, of a very transparent, 

 glassy appearance, the coloration assisting this appearance ; it has a 

 darker dorsal stripe, and a dark stripe rather above the middle of the 

 slope ; this is somewhat en echelon on the segments, the forward end 

 being the higher. The darkness of this stripe is slight, as though an 

 attempt to tint them brown had all but failed. The obliquity of the 

 lateral one is due to its occupying the area between two pale fine lines, 

 that are the oblique lines proper. The dorsal line has a pale border 

 that is not continuous with the oblique lines, but the upper border of 

 the lateral band is a pale line that (with a little twist) is continuous 

 with another margining the lower border of the dark patch on the next 

 segment behind, which, again, is continuous with one on the segment 

 behind, passing obliquely downward and backwards through the spiracle; 



