26 LETJCOPHASIA SINAPIS. 



wrinkled, with six folds to each segment, covered 

 uniformly, but not densely, with very fine short whitish 

 down. 



Colour a beautiful green, the front segments minutely 

 dotted with black; dorsal line darker green, edged with 

 yellowish-green; spiracular line distinct, of a fine clear 

 yellow, edged above with darker green ; spiracles indis- 

 tinguishable ; belly and legs translucent green. 



When the larva is about to spin, it fastens itself, 

 with the head upwards, to a stem of its food-plant by 

 a little webbing at the head and at the tail, and with a 

 thread round the fore part of the body. At first it 

 rests quite flat on the stem, but after some hours it 

 raises its back, and bends itself into a bow, the head 

 and tail still fastened to the stem, and the thread round 

 the body being much stretched; in this position it 

 remains about two days, then it casts its skin for the 

 last time (the threads which fasten down the head 

 apparently being attached only to the larva skin), and 

 becomes a pupa. The pupa when arrived at its full 

 colour is very beautiful. In shape it is slender, very 

 acutely pointed at the head, not so acutely at the tail ; 

 the wing-cases projecting in a swelling curve to nearly 

 twice the width of the body, and meeting in a blunt 

 ridge; the head is thrown back, and the pupa rests 

 with the wing-cases touching the stem, fastened by the 

 tail and by the thread round the body. 



The skin is semi-transparent, the colour a lovely 

 delicate green ; the abdomen rather yellowish ; just in 

 the spiracular region there runs all round the body a 

 stout pink rib, enclosing the greenish spiracles ; from 

 this a strong pink line branches off, bordering the outer 

 edge of each wing-case, and the nervures of the wings 

 themselves are delicately outlined in pink. 



I received some eggs on August 2nd, and again on 

 September 1st, 1866 ; the larvse appeared on August 

 8th and September 6th respectively; full fed on Septem- 

 ber 26th and November 8th ; in pupa September 29th 

 and November 9th. The food chosen was either 



