Insects. 



8385 



Frontal tuft ferruginous ; the very long antennas blackish ; the eye- 

 caps yellowish white. The anterior wings shining black-gray, from 

 the coarse black scales appearing darker and almost entirely black; 

 at the base they are generally a little paler ; an oblique costal spot 

 before the middle reaches to the fold, and just before the anal angle 

 is a dorsal spot almost reaching to the middle of the wing; these 

 spots are shining silvery white, sometimes rather inclining to yellow. 

 The cilia have gray scales at the base, which with their black tips 

 form a rather distinct divisional line ; beyond this they are whitish, at 

 the anal angle gray. The posterior wings and their cilia are fuscous. 

 The abdomen and the legs are blackish gray ; the belly and the tarsi 

 yellowish gray. 



The larva is amber-yellow, and feeds on the leaves of Vac- 

 cinium Vitis-Idaea. The mine finally becomes bladdery and in- 

 flated : the change to the pupa state takes place in an oval ochreous 

 cocoon inside the mine : the imago makes its escape through a slight 

 silken tube which leads from the cocoon to the skin of the leaf. 

 I found the full-grown larva and pupa on the Upper Hartz, in the 

 middle of June ; in the lower country it occurs in May. 



Also near Hanover and Glogau. 



Group XVI. 



33. N. SIMPLICELLA. 



Capillis albis, luteo mixtis, antennarum conchula alba; alis anteri- 

 oribus pallide ochraceis, post medium dilutioribus, nitidis, ciliis 

 basi flavescentibus, apice albidis. 



Exp. al. 3 lin. 



This species joins on to the species of Group L, since the anterior 

 wings are less roughly scaled and rather glossy, and the divisional 

 line of the cilia is not so distinct. The latter is, however, still pre- 

 sent, and only appears rather ill-defined because the colour of the 

 cilia at their bases is also very pale. 



The insect is of a very pale colour. The frontal tuft is whitish, 

 mixed with pale ochreous-yellow ; the short antennae, the abdo- 

 men and the legs are whitish, with somewhat of a yellowish tint. 

 The ground colour of the anterior wings is shining whitish, but 

 thickly clothed with pale ochreous-yellow scales, which are more 

 scanty at the base, more plentiful at the apex, but beyond the 

 middle leave the whitish ground almost entirely uncovered. These 

 scales are continued to the cilia, and their tips form the divisional 

 VOL. XXT. L 



