186 EUDOREA CEMBRjE. 



his more skilful eye had detected some points that 

 had escaped mine. It seemed therefore advisable 

 that I should make a further and more careful exa- 

 mination of the larva; besides, my notes of the 

 young larva, which in one important point is quite 

 different from the mature one, were altogether de- 

 ficient, and here Mr. Buckler could not help me, as 

 he had only seen the full-grown larva. I made vari- 

 ous unsuccessful attempts to find it at the commence- 

 ment of the present year, both in the Picris and the 

 Tussilago, of which in one or two spots there was a 

 good growth ; and it was not until the 27th of March 

 that I at last succeeded in meeting with it in the 

 Picris. Again there were four larvse at the same 

 root, and with the same inequality in their ages — 

 extended in walking the smallest measured three and 

 a half lines, the biggest seven and a half lines ; the 

 latter I should judge being two months in advance of 

 the former. This inequality was retained throughout, 

 for on the 2nd of June a moth emersred, whilst one 

 larva still remained feeding. 



The two youngest larvae I have seen were of 

 slender shape, and of nearly uniform width. The 

 head was shining brown. The colour in the one was a 

 semi-transparent greenish- white, with the spots very 

 conspicuous, large, black, and prominent ; in the other 

 the green tint was absent, and the spots were dark 

 grey, not black. The hairs were black and bristly. 

 They were between three and four lines long, and 

 were probably in their second skin. 



With the next moult an apparent transformation 

 occurs in the spots. To the naked eye they now 

 appear small, black, and bristly ; but it is only an 

 optical illusion, due to the loss of colour in the spot, 

 and the consequent prominence of the insertion of 

 the black bristly hairs. At this stage it begins to 

 assume a glistening appearance. 



No further change takes place in the next moult, 

 but in the following and last one the bristly look of 



