82 BRITISH BUTTERFLIES. 



larva is exceedingly small, being only -625mm. in length ; it is similar 

 to other young Lycaenid larva3 in having a slight mediodorsal furrow, 

 and sloping sides, and is furnished with rows of long, white, serrated 

 hairs, four dorsal and three lateral, on each segment ; those on the 

 dorsal surface (i and ii) are in pairs on each side of the furrow, both 

 curve backwards, the anterior one being very long ; below these are 

 two spiracle-like discs, outlined with dark olive, and below, a pair of 

 small dark tubercles having a cup-shaped hair (iii), excepting on the 

 3rd, 4th, and 5th abdominals, which only have hairs on the posterior 

 ones ; the subspiracular row of hairs (iv and v) consist of three long 

 ones on each segment, projecting laterally, each having a dark base ; 

 along the ventral edge are similar serrated hairs (vii),and shorter ones 

 on the prolegs. The head is greenish-olive and black ; the body of a 

 pale ochreous in shadow, and pale grey in high light ; to the naked 

 eye it appears wholly whitish ; the entire skin-surface sprinkled with 

 black points; grew to l'6mm. before first moult on August 3rd, the 

 first stage lasting four days. Second instar (August 5th): About 

 2mm. long, the body considerably humped dorsally, from mesothorax 

 to 6th abdominal, theprothorax and 7th, 8th, 9th, and 10th abdominals, 

 being rather compressed ; a decided lateral ridge ; the surface finely 

 granulated, studded all over with serrated hairs of various lengths ; 

 those along dorsal and lateral regions, longest and curved ; all are 

 whitish (excepting those on subdorsal surface, which are dusky) -with 

 bulbous bases, from which rise thorn-like spikes, each base forming a 

 star ; there are also numerous discs scattered over the body. The 

 general colour pale yellow, with a mediodorsal longitudinal brownish 

 stripe, oblique brownish lateral stripes, and a rust-coloured subspiracular 

 line, bordered laterally with whitish; the head shining black, beset 

 with a few fine white hairs. [Other forms occur having a generally 

 pale greenish ground colour with slightly darker markings.] Second 

 moult, August 7th. Third instar (August 8th) : About 5mm. long ; 

 very similar to previous stage, but, on the 7th abdominal segment is a 

 rudimentary gland, or one of indistinct formation, surrounded by 

 minute star-like processes, and a fringe of delicate white spines or 

 bristles, each bearing a tuft of spine-like hairs, extremely fine, similar 

 in construction to those bordering the gland of the larva of Lytaenaarion. 

 [Both forms now closely resemble each other, the brownish marked 

 form assuming a generally green colouring, with only a faint pinkish 

 lateral line.] Third moult, August 12th. Fourth inxtar (August 

 12th) : About 6-5mm. in length, the ground colour of a beautiful 

 clear green, with a darker green mediodorsal furrow; three longi- 

 tudinal rows of oblique dull green side markings, and a waved dull 

 green lateral band, bordered below by a pale line and faint, dull, 

 brownish-pink streaks ; the whole surface is thickly sprinkled with 

 serrated hairs of different lengths, those bordering the dorsal furrow 

 being the longest; they vary from white to ochreous-brown, have 

 similar swollen star-like bases, varying in form and colour — some 

 brownish, others white, resembling little glass petals ; as in previous 

 stage, numerous discs are scattered over the surface; the spiracles 

 prominent, outlined with brown; the gland on the 7th abdominal is 

 now more distinct, but surrounded with similar processes and bristles. 

 Fourth and last moult, August 23rd. Fifth (final) instar : When 

 fullgrown measures 10mm. in length ; of the usual onisciform shape, 





