HELIODES ARBTJTI. 87 



and is of full yellow colour, turning rather brownish 

 just before hatching on the seventh day. 



The newly-hatched larva is white, with brown head 

 and a narrow brown plate on the second segment. 

 After living hidden within a seed-capsule and feeding 

 on the unripe contents for about from fifteen to seven- 

 teen days, during which it has got through its earliest 

 moultings and acquired a colouring that assimilates 

 most wonderfully well with that of the capsule of the 

 plant, as it waits outside for its penultimate moult ; it 

 has a brown head streaked and spotted with darker 

 brown, and the body is either of a pale watery-green 

 colour or slightly tinged with pinkish-grey, and 

 marked with a dark green dorsal line, a whitish sub- 

 dorsal line, and a stouter white spiracular line, the 

 ventral legs clear and nearly colourless ; after this 

 moult it is nearly six millimetres long, the head and 

 second segment pale brown, with slightly darker brown 

 marks, the rest of the body much deeper and richer 

 coloured than before, either a greenish-grey or a pink- 

 ish-grey ground — as both varieties occur at this stage 

 — and now the dark slaty-green dorsal line runs in the 

 middle of a broad softened stripe of paler ground- 

 colour than the rest of the back and the side ; next 

 comes the whitish subdorsal line, and after an interval 

 of ground-colour the perfectly white spiracular stripe ; 

 both of these are very conspicuous. Though all the 

 ventral legs are equally well developed, it still often 

 assumes its former favourite position while resting, 

 which is very much like that of a half-looper, holding on 

 sometimes by the anal and the fourth pair of ventral legs 

 only, at other times with the addition of the third pair, 

 while the others and all the fore-part of the body are 

 held off free, with the head bending downwards, form- 

 ing an arch. After feeding three days the ground- 

 colour is lighter and greener, and the length when 

 laid up is eleven millimetres. 



After the last moult it attains in four days its full 

 growth, when the length is twenty millimetres and 



