PETASIA JSUBECULOSA. 9 



points bent downwards and curved like claws ; the 

 colour is a deep and dingy red during the first year, 

 and in the second becomes a blackish-brown, bearing 

 a slight purplish gloss. (W. B., 9, 4, 83; E.M.M. 

 XIX, 271.) 



Peridea trepida. 

 Plate XXXVI, fig. 4. 



On the 26th of April, 1870, Mrs. Hutchinson kindly 

 sent me twelve eggs of trepida, which began to hatch 

 May 11th, and were all out on the 12th. 



The egg is circular, convex above, flattened beneath, 

 smooth ; of a delicate bluish opaque white, which it 

 retains to the last ; the only slight change that occurs 

 just a few days before hatching is that a small grey 

 speck becomes indistinctly visible in the centre. 



The newly-hatched larvaa were robust-looking little 

 fellows, of a greenish-yellow colour, with black dots 

 and hairs, the head and its lobes being outlined with 

 black. At this early age, as soon as extruded from the 

 egg, it assumes the posture in repose, which is so 

 characteristic of this species through all its larval 

 existence, its back forming a hollow curve with the 

 head and tail erected free from the surface of the leaf 

 to which it is attached. 



At its third moult its length was about five- eighths 

 of an inch, it had then its characteristic stripes, viz. a 

 double pale yellow dorsal and oblique side stripes on 

 a green ground colour, from which the black dots had 

 disappeared. * * * * (W. B., Note Book II, 

 136.) 



On the 23rd of May, 1882, I received two eggs laid 

 on the underside of oak bark, set up in a wood to dry 

 about a week before ; these eggs were part of a batch 

 so found by a son of Mr. W. R. Jeffrey, who sent them 

 to me. 



The shape of the egg is hemispherical, that is, 



