360 feRITISH LEPIDOPTERA. 



to be modified in this respect, if it is to represent the order of the 

 mature larvae (Poulton). Adult larva [Larva sent September 14th, 

 1901, by Dr. Sharp, from Koly Island, Northumberland, said to 

 have been 4 days without food, appeared to be anxious to go 

 down for pupation and is somewhat dull in its colouring. Of its 

 true legs five had had the last (tarsal) joint amputated, in one the 

 amputated portion still adhered by a shred of tissue. These wounds, 

 which had bled seriously, no doubt made any hope of raising the 

 insect rather faint] : It is a nice example otherwise of the green 

 form of the larva, the colours are dirty green, with black stripes, no 

 other colour, except the basal half of the horn and spiracles, which 

 are orange. Length, 3^ins. The head has two black vertical stripes 

 on each side, a broad marginal one, and a narrow anterior one, 

 the latter central between the marginal one and the middle suture. 

 The spiracles are really a dirty orange or dull brown, but are in 

 a patch of black, which leads one to say at first, spiracles black. 

 There is a trace of black mark at the incisions on the spiracular 

 line, more pronounced on the first two abdominal segments, and 

 on the thoracic it continues the black spiracular mark and enlarges 

 that round the black spiracle. On the mesothorax and on each segment 

 to abdominal segment 7, there is subdorsally a black mark at the anterior 

 margin of the segment on each side, largest on the mesothorax, where 

 it encroaches on the 2nd subsegment, elsewhere it is confined to the first 

 subsegment. On abdominal segments 1 and 2 is a black patch directly 

 above spiracle and halfway between it and subdorsal patch as to level, 

 it is on the 4th subsegment, each segment after 1st abdominal having 

 apparently 9 subsegments. These lower marks are, in fact, the anterior 

 ends, the subdorsal marks being the posterior, of the diagonal black 

 stripes, which, in this specimen, are complete as to the posterior 

 five on the right side and as to six on the left ; beneath them, at 

 their anterior ends, the green is paler and looks as if a yellow 

 mark occurred beneath the black stripe, possibly in this specimen 

 before its colour faded, probably in brighter coloured examples. 

 On the 8th abdominal segment the stripes proceed backward to the 

 base of the horn, which somewhat confuses the subsegmentation which 

 is so distinct in the anterior abdominal segments. The horn is 

 short, thick, curved, fV D - long, rather more than half of it basally 

 is orange, with regularly disposed rough (hair-bearing) points 

 darker, the further portion is black. The subsegments are very 

 finely wrinkled and have some very small rough points, but no 

 spicules or hairs, the legs are black. The subspiracular flange 

 is very marked, rising nearly to level of spiracle at front of segments 

 much below it posteriorly, beneath it are two other less fully 

 developed ridges. Anal plate green (yellow margin ?) thinly covered 

 with rough points that are hardly spicules. Prothoracic plate green, 

 with a black shading at anterior margin, centrally (Chapman). 

 Buckler describes the fullgrown larva (Larvae Brit. Butts, and Moths, ii., 

 pp. 22-26); Newman describes a larva obtained at Alderney (Etitom., 

 viii.. pp. 272-4) ; Doubleoay gives a translation of Boisduval's descrip- 

 tion (E/tt., vi., pp. 561-2) ; Embleton also describes the same larva as 

 that described above by Chapman ( E.M.M., xxxvii., p. 297), and 

 Brazenor described one (Ent., xxxii., pp. 15-16). 



Variation of larva. — Boisduval says that the larvae of this 



