TRIFIDsE. 173 



Larva when full grown about an inch and a quarter in 

 length, slender, stoutest in the middle, tapering a little in 

 front and more toward the hinder extremity ; the folds and 

 divisions of the segments moderately indicated on the first 

 four or five, but hardly noticeable upon the remainder ; the 

 first and second pairs of prolegs less developed than the rest. 

 Head rather smaller than the second segment, slightly hairy, 

 very pale grey, having on each side four lines of black dots 

 in continuation of the dark stripes on the body ; dorsal plate 

 dull dark brown, through it run conspicuously the dorsal and 

 subdorsal pale stripes ; ground colour on the middle of the 

 back pale greyish-ochreous, brownish-grey, or reddish-grey, 

 the sides darker and browner; the dorsal stripe tapers at 

 each extremity of the larva, but is narrowest in front, and of 

 the pale greyish-ochreous already described, faintly outlined 

 interruptedly by short lines or dots of black, and sometimes 

 by freckles of a deeper ochreous-grey tint; while in some 

 examples two short black streaks appear at the beginning of 

 each segment almost forming a V pointing forwards ; a kind 

 of dorsal chain-pattern is formed by a rather broad sinuous 

 stripe of dark grey-brown, below which the subdorsal stripes, 

 a little paler than the ground colour, are edged with a line of 

 dark brown ; beneath this are placed three other dark brown 

 lines, the lowest of which is the spiracular, and is broader 

 than the other two, which last are slightly sinuous, the 

 second bearing a pale dot at the beginning of each segment, 

 and touching the spiracular stripe in the middle of the seg- 

 ment ; spiracles circular, black ; beneath them is a broad stripe 

 of very pale brownish-grey edged above with a paler thread 

 and below with a rather darker stripe of reddish or greyish- 

 brown, followed by a paler one above the legs ; undersurface 

 rather deeper greyish-brown, with a central brown stripe 

 bearing upon the middle of each segment, beyond the fourth 

 a round blackish spot ; legs pale brownish -grey ; prolegs 

 similar, with a dark brown dot on the outside. When young 

 it appears to be a veritable looper, twelve legs only being 



