246 /.HI'/DOPTEkA. 



On tli-^ "il'g '" Jiil,\' itiitl Alif^iist. 



JjAK\ A seven-eighths of an inch in length when full grown, 

 slender, thici^est at the ninth and tenth segments, thence 

 tapering gradually forward, though nujst from the third seg- 

 ment, also a little towards the anal extremity; head very 

 small and narrow, with the mouth protruded iu front, pale 

 watery-green with a fleshy tinge; thoracic segments — 

 generally paler than the rest of the body — light warm pinkish- 

 yellow-green, sometimes the three or four hinder segments 

 are similar, while those of the middle are of a deeper, stronger 

 green inclining a little to pink or slate-grey ; or sometimes 

 of the same pinkish-yeliow-green throughout, and the sides 

 often deeply tinged with pink ; conspicuous on either side 

 of the back is an opai|ue whitish or faintly yellowish-white 

 gul)dorsal stripe ; the dorsal vessel of brownish-red, con- 

 tinuous on the thoracic segments, shows obscurely through 

 the skin of the back as though deep below it, in some parts 

 pulsating between whitish threads, but at the segmental 

 divisions strongly and clearly marked on the surface as a 

 spear point, or tliick elongate spot of dark red, often pro- 

 longed on one or two of the hinder segments ; the anterior 

 margin of the anal prolegs is pale primrose-yellow ; very 

 fine brown trapezoidal raised dots are sometimes noticeable 

 on the back ; on the undersurface a central yellowish stripe ; 

 the small tlesh-coloured spiracles are situated on a tine 

 tracheal whitish thi'ead which shows distinctly through 

 the clear skin. This assimilates well with the internal 

 pale fibres wiiich show tlirough the stem of its food- 

 jihuit. 



It remains (piietly through the day on the stem of its 

 food-plant, but wakes up at sunset, and feeds, and continues 

 to do so at intervals through the night, and is then very 

 lively. AV'hen full fed and about to change, it contracts a 

 little in length and appears stouter, loses its lively colouring, 

 grows torj)id, holds on to any object occasionally by the 



