CHCGROCAMPA PORCELLTJS. 117 



whitish subdorsal line with edges rather darker than 

 the ground colour makes its appearance. 



The first moult comes when the larva is 6 mm. long. 

 After the moult the skin shows eight subdivisions in 

 each segment set with transverse rows of whitish round 

 dots, each bearing a tiny black bristle, the general 

 colour pale green, the subdorsal stripe white, the head 

 green with tiny black hairs, spiracles green, indistinct, 

 the little wart with bristles on 12 as before. The 

 second moult comes at the length of 10 mm., and after 

 it was passed I noticed the larva had acquired the 

 retractile movement of the head and front segments ; 

 the colouring much as before, the wart on 12 now pink 

 about 0*2 mm. high, and set with a few short hairs. 

 The third moult at the length of 20 mm. brings the 

 first beginning of the characteristic markings ; most of 

 the larva3 remained green, but there appeared a freck- 

 ling of two tints ; the subdorsal stripe was glaucous 

 green ; on this stripe, in segment 5, a spot round in out- 

 line, of three colours, namely, white where the subdorsal 

 line passes, then lilac, and then dark brown in the lower 

 portion ; in segment 6 a small white spot on the sub- 

 dorsal line; the wart on 12 reddish, the subdorsal line 

 runs up to it and ends there. At this moult one larva 

 turned brown — freckled in two tints of brown, sub- 

 dorsal line dingy buff; the spot on 5 had a reddish centre 

 and a dark brown edge, the small dot on 6 white. The 

 fourth moult came at the length of 30 mm., and then 

 all my larvse turned brown ; I had not one that showed 

 any trace of the previous green colouring. The full- 

 fed larva was, when walking, 55 mm. long, less than 

 50 mm. when at rest, smooth and plump, stoutest at 

 segments 5 and 6, thence tapering very rapidly to the 

 head, which was very small, and with 2 and 3 retractile 

 into 4 ; segment 12 tapers a little, 13 rapidly; on 12 a 

 small two-pointed wart 0*5 mm. high; the skin show- 

 ing eight not distinct folds in each segment. The 

 colour ashy brown, freckled with black, the front of 

 each segment being paler and bearing larger freckles 



