284 BRITISH LEPIDOPTERA. 



prolegs were now glossy, smooth and red, and the hinder half 

 of the anal prolegs, anal flap and rough caudal horn were glossy, 

 but with minute black points ; the caudal horn was now curved, 

 and, viewed in profile, tapered to a rather fine point, but, viewed 

 from above, was seen to be slightly forked at the blackish extremity ; 

 the spiracles were red, finely outlined with black. Fifth instar : 

 Between August 26th-29th most of the larvae moulted for the fourth 

 time, and, on the last day of August and September ist, I figured the 

 most advanced (pi. xxii., fig. 31), which was then 2in.- 5lin. in 

 length, its proportions were slender, the head somewhat bluntly 

 conical, the segmental divisions were rather deep, as were also 

 the subdividing wrinkles, eight in number on each segment beyond 

 the thoracic segments, excepting the 12th, which bore the rough 

 curved caudal horn ; these deep wrinkles were blackish-brown and 

 made the segments appear like a series of rings. The colouring 

 and design of the larva were now very beautiful, the skin soft 

 and smooth, the head, plate of second segment, the anterior legs, 

 ventral prolegs, the hinder parts of the anal prolegs, the anal 

 flap and the caudal horn were all as glossy as if highly varnished, 

 and were sprinkled with raised black dots ; the broadish dorsal 

 stripe became gradually thicker towards the middle of each seg- 

 ment and then narrowed as gradually towards the end, the white 

 or yellowish stripe by which it was bounded was consequently 

 thicker at the beginning and at the end of each segment than in 

 the middle ; this was beautifully relieved by a stripe of the full 

 and bright green ground-colour, followed by another or subdorsal 

 white stripe, which also gradually widened to the middle of each 

 segment, in which was set the orange-red spiracle, edged with 

 black ; close beneath this was the slightly inflated pale yellowish 

 spiracular stripe, interrupted at the end of each segment; the 

 belly was wholly of the green ground-colour ; the head was orange- 

 reddish, more or less tinged with greenish, the deep yellow stripes 

 at the side were bordered in front with rather dark red and behind 

 with deep red, the latter bordering being broader below and shading 

 above gradually into the ochreous-green colour of the back of 

 the head. By September 3rd, this larva had grown to be 3m. 2lin. 

 when stretched out, and the white stripes were becoming interrupted 

 in the middle ; the front edge of the second segment (next the head) 

 was of a dark-blue green, and a streak of shining reddish-black 

 was situated in front above the base of each of the anterior 

 legs. This larva went down for pupation on September 5th (Buckler). 

 The fullgrown larva is smooth and elongated ; the anal horn slightly 

 curved ; the head round ; the ground-colour fine sage-green, wrinkled 

 transversely with dark brown : a very broad pinkish-grey dorsal 

 line, somewhat dilated towards the posterior part of each segment, 

 bordered by an interrupted whitish line, on either side of which is 

 another whitish, and rather interrupted, longitudinal line ; also an 

 interrupted, pale yellow, lateral line just below the stigmata, 

 between which and the longitudinal whitish line above-mentioned, 

 is another irregular and macular ill-defined line. Abdomen green, 

 wrinkled with black, and a patch of dull pinkish-yellow in the middle 

 of each segment ; the stigmata orange-red, bordered by black. Head 

 pale yellowish-brown, with two short and thick black dashes above, 



