NOTODONTA DROMEDARIUS. 151 



segments thrown up in the air ; the head slightly 

 wider than segment 2, set on at a slant, the lobes 

 separated so as to show a small notch on the top ; 

 segments 2 — 4 narrower than the rest; on 5, 6, 7, 

 three dorsal humps, like saw-teeth, pointing backwards, 

 the dorsal hump on 8 smaller and more upright ; on 

 12 a tall, straight dorsal hump ; segment 13 sloping 

 away rapidly, the anal prolegs small and peg-like, the 

 ventral prolegs well developed ; the skin soft but much 

 wrinkled ; colour on the upper part of the body opaque 

 yellow, a pinkish-purple broad dorsal stripe on 2 — 4, 

 also colouring the folds and humps on the following 

 segments and ceasing with the hump on 8, the humps 

 on 5 — 7 spotted with white on their sides. Along the 

 side are slanting streaks of rich green, just above 

 the spiracles the whole ground becoming rich green. 

 About the middle segments the colour round the 

 spiracles yellow, but the front segments all green 

 below; the belly on 5 and 6, and on 11 and 12, 

 purplish-brown, and 7 — 10 with a purple-brown broad 

 streak just above the legs ; thoracic legs brown with 

 green rings, ventral prolegs mottled green and brown ; 

 the head pinkish-brown with black dots ; the spiracles 

 with whitish centres, black rings, whitish outer rings, 

 and brownish bordering outside; the general effect 

 of the colouring very rich. Owing to the wrinkling of 

 the skin there are no distinct lines, but the various 

 colours are more or less mottled. I have had larva3 

 of less brilliant general hue but with irregular patches 

 of brilliant green, differing in shape on the two sides. 



The great feature of this larva is the row of four dor- 

 sal humps ; tritophus has three, and ziczac two ; they are 

 alike in their habit of holding up the small anal pro- 

 legs, which from their size and shape do not seem meant 

 to be of much use. 



The larva spins an oval cocoon of tough, shining, 

 yellowish-brown silk, covered all over with bits of 

 earth ; I measured one, 25 mm. long and 15 mm. wide ; 

 the pupa I measured was just 20 mm. in length, stout, 



