LIFE-HISTORY OF LYC.ENA ARGIADBS. 247 



a medio-dorsal longitudinal brownish stripe, oblique brownish 

 side stripes, and a rust -coloured subspiracular line, bordered 

 laterally by whitish ; the head is shining black, and beset with 

 a few fine whitish hairs. Other forms occur, having a generally 

 pale greenish ground colour, with slightly darker markings. 



Second moult, Aug. 7th. After second moult — nine days 

 old — it is J in. long ; very similar to previous stage, but on the 

 10th segment is a rudimentary gland, or one of indistinct forma- 

 tion, 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 L. arion larva. Both forms now more closely 

 resemble each other, the brownish marked form assuming a 

 generally green colouring, with only a faint pinkish lateral line. 

 In this stage they greedily feed on the seeds of Medicago hqmlina, 

 eating through the capsule, and devouring the contents, but 

 appear to feed mostly at night. 



Third moult, Aug, 12th. After third moult — eighteen days 

 old — it is ^ in. long, the ground colour is a beautiful clear green, 

 with a darker green medio-dorsal furrow, and three longitudinal 

 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 ser- 

 rated hairs of different lengths, those bordering the dorsal furrow 

 are the longest, they vary from white to ochreous brown, and 

 have similar swollen star-like bases, which vary in form and 

 colour — some are brownish, others white, resembling little glass 

 petals. As in the previous stage, numerous disks are scattered 

 over the surface ; the spiracles are prominent, and outlined with 

 brown. In this stage they feed as much by day as by night, but 

 are much slower between the moulting, occupying eleven days 

 from the third to fourth moults. The gland on the 10th seg- 

 ment is now more distinct, but surrounded with similar processes 

 and bristles. 



Fourth and last moult, Aug. 23rd. After fourth moult, and 

 fully grown, it measures fin. long. It is of the usual onisciform 

 shape, with slightly flattened sides, and with only a very shallow 

 dorsal furrow, bordered each side by a fringe of spinous bristles, 

 slightly serrated, and varying in length ; the whole surface is 

 densely studded with shorter but similarly formed bristles, which 

 vary much in length and colour from white to pale brown, each, 

 including the longest dorsal ones, have wonderfully formed bases 

 (similar but more pronounced than in the previous stages), com- 

 posed of a bulb-centred star, the points rising from the base ; 

 some are wholly white, others olive-green ; there are also numer- 

 ous shining whitish-green disks outlined, or set in black rings 

 more or less starred, of various sizes, and scattered over the 

 whole surface ; the spiracles are whitish, outlined with brown, 



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