Insects. 8357 



with somewhat of a bronzy gloss ; the cilia in the former are paler gray, 

 in the latter bluish black, only grayish at the tips ; the dark colour of 

 the costal cilia is very striking in N. atricapitella, especially in the 

 female. The male of N. samiatella has, from the anal angle to the 

 middle of the inner margin of the posterior wings, a second row of 

 stouter and shorter scale-like cilia, which are longest at the anal angle, 

 and become gradually shorter and cease in the middle of this margin ; 

 they generally stand somewhat erect, with the tips turned upwards, 

 and reach nearly to the middle of the other cilia, forming with their 

 tips to some extent a divisional line in the cilia, which in the middle 

 of the inner margin flows into it. These scales are wanting in N. atri- 

 capitella. The cervical tuft is yellowish white in N. samiatella, black 

 in N. atricapitella. In the males of both species the antennae are of 

 nearly equal length, nearly two-thirds as long as the anterior wings. 

 In the females of N. atricapitella the antennas are scarcely perceptibly 

 shorter, whereas in the females of N. samiatella they are barely half 

 as long as the anterior wings. The anal tuft is grayish in N. atricapi- 

 tella cT, more yellowish in N. samiatella $ ; in the females of both 

 species the tip of the abdomen is rusty yellowish, though to a different 

 extent. 



I do not doubt that these two species are those of Herrich-Schaeffer, 

 and that Stainton's species'is identical with the species of the same name 

 in Herrich-Schaeffer. Frey's species seems doubtful, since his notices 

 suit for both species. Zeller's N. samiatella $ is also probably 

 Herrich-Schseffer's N. samiatella, since this comes nearest to N. rufi- 

 capitella in form and colour of the anterior wings. 



I have bred numbers of both species from the larvae, though but few 

 males of N. samiatella, without being able to find any difference 

 between the mines or larvae, or between those of N. ruficapitella. 

 The excremental track is very variable, — sometimes like a thin line, 

 sometimes it almost fills the entire mine, but generally it is midway 

 between the two extremes. I had attempted to separate the mines by 

 the form of the excremental track : this was, however, not entirely 

 practicable, owing to the very imperceptible gradations, and eventually 

 all three species came from the same mines. 



5. N. NITIDELLA. 



Capillis ferrugineis, penicillis et antennarum conchula luteo-albidis ; 

 alis anterioribus valde nitidis, orichalceis, post medium diluti- 

 oribus apice fuscescentibus, ciliis fusco-griseis. Exp. al. 

 2J lin. 



