8384 Insects. 



I must admit that, although I have bred great numbers of both spe- 

 cies, yet I should have referred individual specimens of one species to 

 the other had I not been guided by the information furnished by the 

 larvae. 



The amber-yellow larva feeds, in July and at the end of September, 

 in the leaves of Vaceinium Myrtillus ; the mine is serpentine, unless 

 the confined space compels a blotch-like formation. The cocoon is 

 broad and flat, rather longish, brown. 



I do not doubt that N. Fagella, H.-S., and N. Fagi, Frey, belong 

 here. In the descriptions there is nothing opposed to this. Before 

 I had bred N. Myrtillella I had taken it singly on the trunks of beech 

 trees amongst N. turicella. Herrich-Schaeffer, to whom I sent some, 

 and mentioned my conjecture that the species was distinct from 

 N. turicella, enumerated in a subsequent letter N. Fagella amongst 

 the species which he had received from me, which could only have 

 been N. Myrtillella. Were N. Fagella another species which mines 

 in beech leaves, I should certainly have bred it in these latter years, 

 but from the mined beech leaves I constantly obtained only N. turi- 

 cella and N. tityrella. 



Probably Von Heyden formerly took N. turicella and N. Myrtillella 

 for one species, especially as they occur in company, and, after he had 

 bred N. turicella from beech leaves, has through error labelled speci- 

 mens of N. Myrtillella with the indication mentioned by Frey, "bred 

 from beech leaves," or the latter has probably taken the bred speci- 

 mens of N. turicella seen only hastily at Von Heyden's for a different 

 species than the captured specimens. Frey suspects in N. Fagella 

 the summer brood of N. Floslactella, which, from the similarity of this 

 species with N. Salicis and N. Myrtillella, likewise confirms my 

 notion. 



According to this, N. Fagella would be the oldest name for our 

 species ; but, as it might cause confusion, it would be best to retain 

 the name derived from the food-plant given by Stainton. 



Group XV. 

 32. N. Weaveri, Stt. 

 Capillis lsete ferrugineis, antennarum conchula flavido-alba ; alis 

 anterioribus grosse squamatis nigris, fascia abbreviata in costa 

 ante medium et macula in angulo anteriore argenteis, ciliis post 

 lineam nigram albidis. Exp. al. 3^ — 3f liu. 

 Stainton, Annual 1855, 49, Tf. 1, f. 5 ; Man. ii. 432. Herrich- 

 Sclwffer, v. p. 346. 



