506 Lord Walsingham on 



to be near P&disca crambitana, Wlsm., and it is an 

 equally beautiful and remarkable form. We may hope 

 that at some future time the number of known specimens 

 (at present only three) may be increased. 



[Psedisca (?) norvichiana, Hb. 



Tortrix norvichiana, Hb. Samml. Eur. Schm., VII., PL 

 XL., 252 (1814); Eugnosta norwichiana, Hb., 

 Verz. bek. Schm., 394, No. 3832 (1826); 

 Argyroptera norvichiana, Gn. Ind. Meth., 65 

 (1845) ; Eupecillia norwichiana, H.-S. Schm. Eur. 

 IV., 179 (1849) ; Argyroptera norvichiana, 

 Hdnrch. Lp. Eur. Cat., Meth., 66, No. 158 (1851). 



I should like to call attention to norvichiana, Hb., the 

 species which precedes adamantana, Gn., in the Index 

 Methodicus, in regard to which Herrich Schaffer 

 remarks, " vielleicht exotisch." Nothing appears to be 

 known about this insect, nor is it mentioned in 

 Staudinger and Wocke's Catalogue. A study of the 

 figure leaves a strong impression upon my mind that it 

 is a Psedisca allied to adamantana, nor should I be 

 surprised to receive both species from some sub-arctic 

 region.] 



Pdsdisca smithiana, sp. n. 



Antennae white. Head, Palpi, and Thorax white. Forewinqs 

 shining white (in some specimens with a slight yellowish tinge), 

 some faint smoky grey lines and streaks in the $ are almost 

 entirely obliterated in the $ specimen ; these appear along the 

 fold and around the margins of the cell, some also descending 

 obliquely from the costal margin before the apex, whence also 

 arise one or two silvery marks, extending downwards towards the 

 ocelloid patch, which is margined before and behind with silvery 

 white, preceded at its lower angle by a minute group of black 

 scales, and contains two black dots; cilia white, profusely and 

 minutely speckled with black. Exp. at., 16 mm. Hindwing* 

 very pale whitish grey ; cilia white. Abdomen very pale greyish. 

 Legs white. 



Type. <$ ? . Mus. Wlsm. 



Hab. Colorado Loveland, 5,000 ft., July, 1891 

 (Smith). 



Nearly allied to P. pergandeana, Fernald MS., but 



