Insects. 8373 



21. N. GLUTINOS.E, Stt 



Capillis ochraceis, antennis mavis longis, conchula flavida; alis 

 anterioribus angustis, olivaceis, violaceo-tinctis, apice violaceo, 

 aut totis nigro-caeruleis, fascia postica angusta, luteo-alba, parura 

 nitida, ciliis apice griseis. Exp. al. 2 — 2j lin. 



Slainton, Man. ii. 436. 



This species is closely allied to N. distinguenda and to N. micro- 

 theriella. The differences between it and the first-named species 

 have been already given : the points of difference between it and N. 

 microtheriella consist in the rather larger size, the less smooth surface 

 of the anterior wings, and their being tinged more with violet and not 

 with so pure a blue ; also by the very narrow fascia, not so purely 

 silvery and less shining; and finally by the longer antennae. Those 

 specimens of N. glutinosae which have little of the violet tinge are still 

 more closely allied with N. turicella, but the latter has the frontal tuft 

 paler, the antennas white or silvery gray to the tips, the surface of the 

 anterior wings is rather smoother, their tip is not so blue, more of a 

 violet-brown, the fascia is whitish with a faint silky lustre ; it is placed 

 rather obliquely, and generally expands on the inner margin towards 

 the base, or this expansion is at least indicated from the fascia near 

 the inner margin being rather broken towards the base ; the dark 

 margin on the basal side of it is more pronounced. Besides, the legs 

 in N. turicella are paler, especially the anterior legs and femora are 

 whitish gray, whereas in N. glutinosae these are blackish. The frontal 

 tuft is of a more or less bright ochreous, sometimes almost luteous ; 

 the cervical tuft and the eye-caps are whitish, with a slight inclination 

 to yellow; the blackish antennae in the male reach beyond the fascia, 

 in the female beyond the middle of the costa ; their basal half is some- 

 times whitish. The abdomen and legs are blackish, the former whitish 

 gray beneath ; the middle tibiae and the ends of the posterior tarsi are 

 whitish. The ground of the rather elongate, finely-scaled anterior 

 wings is dull silky olivaceous, as in N. turicella, suffused more or less 

 with violet or blue, sometimes so slightly that the ground colour remains 

 almost quite unsullied as far as the fascia, or at most there is only a 

 faint and ill-defined violet-brown border before the fascia ; but some- 

 times, and especially in the females, the surface is uniformly suffused 

 with blue up to the fascia, either in such a way that the ground colour 

 still remains distinctly visible or so that the entire surface is dark blue, 

 indeed even black- blue, but without this blue colouring being very 



