Insects, 



8379 



are small, whitish, more or less inclining to yellow ; the antennae long. 

 The anterior wings are more coarsely scaled than in the other species, 

 the male has the scales black-gray, with black tips ; in the female 

 they are pure black ; the fascia is equidistant from the base on the 

 costa and inner margin, obtusely angulated or curved in the middle, 

 sometimes almost straight and vertical, rarely with a slight interrup- 

 tion in the middle, and then composed of two silvery spots of equal 

 size. In the male it has a dull slightly golden metallic lustre ; in the 

 female this is more decided. The cilial line forms a large (in the female 

 often depressed) curve round the apex of the wing, running to the anal 

 angle ; before it the cilia are gray, with black tips to the scales, which 

 form *a second divisional line, sometimes only perceptible at the anal 

 angle, but sometimes extending distinctly to the costa. 



The male may be distinguished from the other species, independently 

 of the form of the wings, by the paler, grayer colour of the anterior 

 wings, and from N. arcuata, which is also gray, by the darker hind 

 tarsi ; the female may be generally recognised by the brown frontal 

 tuft. Besides, in the other species the fascia goes rather obliquely 

 from the costa to beyond the middle, is generally refracted below the 

 middle, and is further from the base on the inner margin than on the. 

 costa. From N. atricollis, which sometimes has the fascia almost of 

 the same form, the longer antennae will distinguish it. 



The larva is greenish yellow, with brownish head and brownish 

 spots on the second segment. It feeds in the leaves of Agrimonia 

 Eupatoria, sometimes very abundantly, in a long tortuous mine, with 

 slender excremental track, and changes to a pupa inside the leaf, in 

 a violet-coloured cocoon. 



At Ratisbon, Frankfort-on-the- Maine, and at Wolfenbuttel ; not 

 scarce in the last-named locality. 



26. N. atricollis, Stt. 

 Capillis laete ferrugineis, alis anterioribus postice latioribus, gros- 

 siuscule squamatis, nigris, fascia media subobliqua interclum 

 interrupta argentea, nitida, ciliis post lineam nigram albidis ; 

 tarsis posticis nigris, apice pallidis. Exp. al. 2 lin. 

 Stainton, Ann. 1857 ; Man. ii. 435. 

 ? N. argyrostigma, Freij, Tin. d. Schweiz, 379,13. Lin. Ent. xi. 

 394, 18. (The specimen from Baumgarten.) 



In the form of the anterior wings this approximates to the preceding 

 species, since they are dilated in the same way, though not nearly to 

 the same extent. The frontal tuft is bright rusty yellow ; the eye -caps 



