66 (March, 



the dorsal area forms a broad yellowish stripe, enclosing the flne, dark green medio- 

 dorsal line ; the purplish subdorsal stripes have become broken into large, irregular, 

 dark sienna-brown patches, which on the dark green ground-colour are very 

 conspicuous : these dark patches are most dense on the front and posterior segments ; 

 the ridge on the 9th segment is also of this dark colour ; head now almost uniformly 

 green ; spiracles dark sienna-brown, with pink centres. Ventral surface of the same 

 green as the dorsal area, but numerously spotted with dark sienna-brown ; prolegs 

 also green, with the outside of the front pair purple ; anterior-legs green, marked 

 ■with brown. 



By August 15th, many of the larvae were becoming full-fed, though some of 

 them were still not half grown. The adult larva is about an inch and half long, and 

 of fair bulk, inclining, however, more to slenderness than obesity. Head rounded 

 at the sides, rather flattened in front, a little narrower than the 2nd, and still 

 narrower than the 3rd and 4th segments, which, with the 10th, 11th, and 12th, are 

 rather swollen ; the remaining segments are of nearly uniform width, allowance 

 being made for the overlapping at the divisions ; there is a raised transverse hump 

 on the 9th segment, and a smaller transverse ridge on the 6th segment. 



There are two very distinct types of colouring : — 



In Var. I, which is the more numerous, the ground is pale pea-green, the head 

 and the dorsal area at the segmental divisions strongly tinged with yellow ; the lower 

 part of each lobe spotted with black ; the alimentary canal shows thi'ough as a very 

 narrow and interrupted dorsal line ; a purplish-brown patch, marbled with white 

 (this white forming two distinct spots on each of the middle segments), on the 

 posterior half of each segment, except the 12th and 13th, and extending from the 

 subdorsal to the spiracular regions, take the place of the subdorsal and spiracular 

 stripes ; the hump on the 9th segment is dark chocolate-brown at each side, but 

 paler purplish-bi'own in the middle, which gives the appearance of there being two 

 small dark humps ; the smaller ridge on the 6th segment dark chocolate-brown ; 

 spiracles distinct, each being placed on a round lunule of a paler shade of the ground- 

 colour, they are pink, encircled with a clear black ring. 



Ventral area dingy green, in some specimens with a central longitudinal row of 

 white spots ; in others these spots are absent ; the segmental divisions, and the 

 outside of the front pair of posterior-legs purplish-brown ; anterior-legs also reticu- 

 lated with purplisli-brown. 



In Var. tl, the ground-colour is purplish-brown, except the head and 2nd 

 segment, which still partly retain the green character of the more numerous form ; 

 head tinged with brown, and the black spots at the base of the sides of each lobe 

 distinct ; in some specimens two interrupted yellowish lines extend through the 

 dorsal area ; in other specitnens these lines are almost obliterated ; the purplish- 

 brown marks of Var. I are in this form replaced by dark chocolate-brown, but the 

 two white, nearly triangular spots on the posterior edges of the segments (in some 

 specimens from the 2nd to the 11th) show out distinctly ; both the lateral ridges are 

 dark chocolate-brown ; each spiracle is placed in a pale lunular patch, pinkish, ringed 

 with intense glossy black. 



Ventral surface dull purplish or chocolate-brown (in some specimens tinged with 

 dingy green), except on the frontal segments, where it is green, and an interrupted 

 stripe of clear white spots extends through its centre ; segmental divisions purple ; 



