Insects. 8371 



middle. The cocoon is yellowish brown, flat, generally rather broader 

 at one end. 



Besides occurring in England this has been observed at Zurich, 

 Brunswick and Hanover. 



Group VII. 

 19. N. poterii, Stt. 

 Capillis sordide ochraceis, antennarum conchula parva, flavido-alba; 

 alis anterioribus subnitidis, aureo-olivaceis, apice violaceis, fascia 

 postica lata, dilute aurea, nitida, ciliis apice griseis. Exp. al. 

 li lin. 

 Stainton, Ann. 1858; Man. ii. 435. 



Allied to N. ignobilella, but smaller; the frontal tuft dirtier yellow ; 

 the eye-caps very small, yellowish white ; the middle tibiae scarcely 

 paler than the remaining legs, which are of a rather pale gray. The 

 anterior wings are narrow, pale olive-coloured as far as the fascia, with 

 golden gloss ; the tip of the wing is pale violet-blue. The vertical 

 fascia is placed very posteriorly ; it is broad, pale golden, with some- 

 thing of a greenish tinge, and less brilliantly metallic. The tips of 

 the cilia and the posterior wings are pale gray. From the other spe- 

 cies of this group this may be known by the golden fascia. 



The larva (according to Stainton) is yellow, and feeds in June on 

 the leaves of Poterium sanguisorba in mines, at first slender and then 

 blotch-like. The imago in July. 



Hitherto only observed in England. 



20. N. DISTINGUENDA. 



Capillis ochraceis, antennis maris longioribus, conchula flavida ; 

 alis anterioribus angustis, olivaceo-fuscis, apice vix violaceis sub- 

 opacis, fascia postica suberecta, albida, subnitida, ciliis apice 

 griseis. Exp. al. (3) 2j lin., ($>) lj lin. 



Although I only possess a pair of this species I do not hesitate to 

 describe it as new, since it differs decidedly from all the other species. 

 It is closely allied to N. betulicola and also to N. glutinosae ; it is 

 larger than the former. The frontal tuft, eye-cap and cervical tuft, 

 and also the legs, are as in N. betulicola, but the blackish antennae 

 are longer in the male, since they reach perceptibly beyond the middle 

 of the anterior wings to the fascia, but yet they are shorter than in N. 

 glutinosae, in which species they have full two- thirds of the length of 

 the anterior wings and reach to beyond the fascia. The abdomen is 



