78 I September, 



thirtj-four shallow ribs, and with shallower transverse reticulations ; 

 the central space in the top is flat with large shallow reticulations ; the 

 shell has a pearly sheen ; when first laid, it was said to be of a dull 

 whitish, having the faintest greenish tinge, and then grad;ially turned 

 to a pale greenish-yellow. 



When first hatched, the larva has the ventral legs developed on 

 the ninth and tenth segments, and a small undeveloped pair on the 

 eighth ; it is of pale yellowish-green colour, with very fine black dots 

 and hairs. After feeding a few hours, the interior became deeply 

 tinged with dark green, which showed strongly through the clear skin, 

 especially in the middle of the body ; when eight days old, the skin 

 became less clear, and of a uniform light yellowish-green with 

 blackish tubercular dots. 



In twelve or thirteen days, they moulted the first time, and became 

 less transparent than before ; and after the second moult, in five or 

 six days' time, they were long and slender, and of a more opaque 

 velvety green, and faintly showed subdorsal lines of paler green. 



After another week, the third moult occurred, when the ground- 

 colour was a little fresher than before, the head very pale green, 

 and a dorsal line of darker green than the ground showed faintly here 

 and there ; the subdorsal lines were whitish-yellow, and also the seg- 

 mental divisions, while the length had increased to 7h lines. 



The fourth moult occurred on 14th of July, and by the next day 

 they had become nine lines long, and the small undeveloped pair of legs 

 on the eighth segment were still to be noticed ; the slender proportions 

 of the larvae, remarkable from the first, seemed now to be even more 

 striking as they attained full growth towards the end of the month, 

 when they measured from eleven to twelve lines in length ; they wex'e 

 of a very yellow-green colour, with yellow segmental folds, the round 

 head of a light green colour with upper lip whitish, and mouth black ; 

 the dorsal line dark green though faint ; the subdorsal strij)e prim- 

 rose-yellow ; the roundish spiracles flesh-coloured, placed on the deep 

 yellow thread-like trachea, showing faintly through the skin. 



On 1st of August, one larva began to spin its cocoon just beneath 

 the crown of the grass-roots, almost close to the surface of the earth ; 

 and others followed in the same way during the next four days, though 

 one larva lingered two or three days longer: this was exactly an inch 

 long as it lay stretched out, according to the habit of this species when 

 at rest among the grass, which it matched in colour remarkably well. 



The pupa is very short, stout, and dumpy, 3^ lines in length, the 

 thorax and wing-covers are well defined, the last rather long in pro- 



