2 EREMOBIA OCHROLETJCA. 



many other larvae, I forgot to look at my unknown for 

 some days ; and when I saw it again it was not the 

 least grown, nor did it look well. This made me 

 resort to other grasses, but without effect ; and I had 

 the mortification of seeing it, day by day, become 

 smaller and feebler, till on the 2nd of July it died. 

 But before the breath was quite out of its shrunken 

 body my regrets were banished, thanks to Mr. W. H. 

 Harwood, of Colchester, who sent me on July 1st a 

 larva precisely similar in form and colour, but much 

 larger in size ; and, what was still better, feeding away 

 hopefully on its proper food — the seeds in a panicle of 

 cock's-foot grass (Dactylis glomerata). ' 



In order to make quite sure of this being its proper 

 food, I gathered fresh panicles of this grass, as well as 

 of two or three other kinds, and put them in with the 

 larva ; but I saw that it roamed over the other kinds 

 till it found the seeds of the cock's-foot grass, and then 

 attacked them ravenously, thus perfectly satisfying 

 every doubt. On the 3rd of July it retired to earth ; 

 and on the 30th the perfect insect came forth. 



This full-grown larva varied in no respect from that 

 which I had myself taken, save in size, for it was 

 twice as large. It was one inch and a half in 

 length, cylindrical, of moderate and uniform stoutness 

 throughout, including the head, the lobes of which 

 were rounded and full ; the legs and pro-legs all well 

 developed. 



Its ground-colour was a bright but very pale opaque 

 whitish-green ; the very broad dorsal stripe whitish, 

 the subdorsal stripe similar, but a trifle less in breadth. 

 Between this and the spiracles the ground-colour 

 became a little deeper; was bordered along the 

 spiracles by a narrow stripe of full deep green ; the 

 subspiracular inflated stripe whitish ; the belly and 

 legs of the ground-colour, a trifle darker than the 

 back. The head was also of the pale ground-colour, 

 with a blackish streak across the mouth, and was 

 more polished than the surface of the body, though 



