1888.] 13 



Of this very pretty species I have seen several specimens, bred by 

 Mr. I. H. Threlfall from beech leaves. Its most striking character is 

 " the effulgent metallic brilliancy" (to quote the words applied by 

 J. I\ Stephens to the silver spots of Argynnis Lathonia) of the silvery 

 fascia, but the glossiness of the basal portion of the wing would alone 

 serve to distinguish it from the usual beech feeder, N. Tityrella, a 

 much duller and more sober looking insect. At present the character 

 of the mine has hardly been sufficiently distinguished. 



Amongst Mr. Threlfall's specimens of this novelty was one perhaps not identical, 

 but likewise from beech ; it had the same brilliant silvery fascia, but the basal portion 

 of the wing was more of a golden-brown, and there was a broader dark band before 

 the fascia, and the head appeared to me black. 



Professor Frey described, in 1856, in his Tineen und Pterophoren der Schweiz, 

 p. 384, a Nepticulafagi from specimens taken (not bred), but he said he felt doubtful 

 whether it was really a distinct species, and not rather a summer brood oifioslactella. 

 He adds that he saw specimens in Yon Heyden's collection, which had been " bred " 

 from beech. I think I may safely say that no one would ever be disposed to take 

 fulgens for any brood of floslactella, and if we needed further evidence to show that 

 Prey's fagi was something very different from fulgens, it would be found in his de- 

 scription of the fascia as "lata, flava (non nitente)." 



Yet Professor Frey seems to have had specimens of fulgens in his possession — 

 even though they would not, and could not agree with his description of fagi. 



In October, 1855, 1 received from him a specimen with the name fagella, which 

 I can now unhesitatingly refer to fulgens. Fortunately I never was much of a believer 

 in types, knowing how easy it is to misplace specimens and to mix up allied species, 

 or the inspection of this specimen would have puzzled me. 



As it is, I can only assume that the description of fagi was made from certain 

 caught Nepticultp, and that other specimens were afterwards placed with them which 

 were not really identical, and that one of these with the name fagella came to me. 



Mountsfield, Lewisham, S.E. : 

 May IQth, 1888. 



DESCRIPTION OF THE LARYA OF EUCLIDIA ML 

 BY GHEO. T. POBBITT, F.L.S. 



A moth of this species, taken June 5th, 1886, at the Green Farm 

 Wood, Doncaster, deposited eggs which were globular in shape, the 

 colour a dull pale green. They hatched about the 28th of the same 

 month, and the young larvae were dingy green with large yellowish- 

 brown head; when walking they looped the back in the same way as does 

 a Geometer, and when disturbed at once rolled themselves up and 

 feigned death. They fed well on grass and common white clover, and by 

 July 22nd were slender creatures of about five-eighths of an inch long, 



