8376 Insects. 



the surface is certainly finely scaled, but not polished and very little 

 shining; the fascia, which is not broad, stands perceptibly beyond 

 the middle and is rather oblique ; its posterior edge is generally some- 

 what concave, whence on the margins it appears rather broader, espe- 

 cially on the inner margin ; its colour is whitish, and it has a dull 

 silky gloss ; towards the base it is bordered by a dark brown stripe, 

 with a faint violet gloss, and the entire tip of the wing, as well as the 

 base of the cilia, is of the same colour. The cilia are darker gray in 

 the middle, paler gray at the tips. The posterior wings and their 

 cilia are gray. 



The larva is very like that of N. tityrella, and feeds in beech leaves 

 simultaneously with it. The mine is also similar, but long, and its 

 tortuosities are not so close to one another. The cocoon is longish, 

 much arched, and of an ochreous-yellow. 



Zeller has (I. c.) mixed N. turicella with N. tityrella, and described 

 them under the name of N. lemniscella. The two specimens from 

 Metzner belong to N. tityrella, as is manifest from the distinct cilial 

 line ; the two specimens from Glogau are N. turicella. That this is so 

 is also evident from the fact that Zeller formerly named for me as 

 N. lemniscella dark specimens of N. turicella as well as specimens of 

 N. tityrella. Paler specimens of N. turicella he pronounced to be 

 N. hemargyrella. But, on the other hand, I consider this latter to be 

 a good species, which I formerly often took on the trunks of beech 

 trees, but which I have never bred along with N. turicella, and I refer 

 to it Herrich-SchaefTer's fig. 816. I describe it as follows: — 



24. N. HEMARGYRELLA, Zell. 



Capillis dilute ochraceis, antennis maris longioribus, conchula alba ; 

 alis anterioribus flavido-albis, nitidis, apice fuscis, fascia post 

 medium lata, subrecta, subargentea, basin versus linea subfusca 

 terminata, ciliis apice late albidis. Exp. al. 2 — 2j lin. 



Zeller, L. E. iii. 323, 9. 



N. iguobiliella, Herrich-Schceffer, fig. 816. 



Of the form of N. turicella, but altogether paler and more glossy. 

 The frontal tuft is pale ochreous-yellow, the cervical tuft and the 

 small eye-caps white ; the antennae of the male have two-thirds of the 

 length of the anterior wings ; those of the female are shorter ; they 

 are silvery gray. The anterior wings are w r hite, slightly inclining to 

 yellow, with the base sometimes clouded with olivaceous ; they are 

 smooth, with considerably silky gloss, with a narrow brownish line at 



