Insects. 



8375 



ground colour. Beyond the violet scales the cilia are fuscous, with 

 the tips paler. The posterior wings and their cilia are gray. The 

 under side of all the wings is fuscous ; the anterior have a feeble 

 bluish gloss, with the apex darker. 



N. luteella differs from N. glutinosae, as also from N. turicella, by 

 the shorter antennas and wings, the larger and whiter eye-caps, the 

 forms of the fascia, partly also by the want of the dark bordering of 

 the fascia towards the base. Besides N. glutinosae has more blue on 

 the disk, especially beyond the fascia, and the fascia is narrow, more 

 defined and not expanded on the inner margin, and before the fascia 

 the anterior wings are irrorated with dark violet. The differences be- 

 tween this species and N. betulicola and N. distinguenda are men- 

 tioned under these latter. 



The larva is pale green, with darker dorsal line, and feeds in July 

 and October in birch leaves. The mine is long, slightly tortuous, 

 generally abruptly angulated ; the excremental line is slender. The 

 cocoon is small and flat, buff-coloured. 



Besides occurring in England, this has been observed at Brunswick, 

 Wolfenbiittel and Hanover. 



Group IX. 



23. N. TURICELLA. 



Capillis pallide ochraceis, antennis maris longioribus, conchula 

 albicla ; alis anterioribus griseo-olivaceis, medio et apice fuscis, 

 violaceo tinctis, fascia obliqua, albida, sericeo micante, ciliis 

 apice griseis. Exp. al. 2 — 2j lin. 



Herrich-Schdffer, v. 355, 1118. 



N. turicensis, Fret/, Tin. 391, 30. L. E. 413, 34. 



N. lemniscella, Zeller, L. E. iii. 313, 4. (The two specimens from 

 Zeller's collection). 



Since both Herrich-Schseffer's and Frey's descriptions were made 

 from captured specimens, I amplify them from a series of bred speci- 

 mens. The frontal tuft is pale oehraceous, the cervical tuft whitish ; 

 the small eye-caps and antennae whitish ; in the male the latter have 

 nearly two-thirds of the length of the anterior wings, in the female 

 nearly the half. The abdomen and the hind legs are blackish gray, 

 only the middle legs and tarsi are whitish ; the anterior legs are pale 

 gray. The ground colour of the anterior wings is olivaceous, rather 

 inclining to gray, sometimes nearly olive-black, not brownish yellow, 

 as Frey says, and not pale brassy yellow, as Herrich-Schaiffer says ; 



