304 LORD WALSINGHAM ON [Feb. 15, 



of which the first forms the outer edge of the second fascia, and about 

 five marginal, the last being in the cilia at the anal angle ; these 

 are also conspicuous on the underside. 



Hind wings scarcely emarginate below the apex, very pale brownish 

 fuscous, slightly shaded about the margins and at the base of the 

 pale cilia. 



The thorax is of the same colour as the darkest portions of the fore 

 wings; the abdomen faintly banded, the anal tufts hghtly ochreous. 



Expanse 20 millim. 



Seventeen specimens, April 16th, 1872, on Currant Creek, aa 

 affluent of John Day's River, North Oregon. 



Genus Pltjtella (Schranek). 

 Plutella CRUCIFERARUM, Zell. (Wockc, 1626). 



This species has been frequently recorded under various names 

 as occurring in North America (see Chambers, Index to described 

 Tineina of United States and Canada, Bull. U.S. Geol. and Geog. 

 Survej', 1878, p 161), as it does also in Europe, Asia, and Africa. 

 I met with it on Mount Sliasta, California, in August 1871 ; but I 

 have no recollection of having found it in tbe same abundance there 

 as in Europe. My list includes nine specimens. 



It is probably the insect referred to by the Editors of the American 

 Naturalist (vol. v. p. 194) under the name of Tinea spilotella, which 

 should be added to Mr. Chambers's list of synonyms. 



Plutella interrupta, sp. nov, (Plate XXXV. fig. 4.) 



Capite et thorace albidis ; antennis albidis, griseo-fusco annulatis et 



bicinctis ; pa/pis tenuibus albidis ; ulis anticis subochraceo-albis, 



dilute griseo-fuscis, ultra medium subliiuratis et in tolo margine 



punctatis, macula parva costali ultra medium griseo-fusca, 



vitta elongata in plica sub medio cellulcB late interrupta fusca ; 



posticis cum ciliis griseis. 



Head and thorax white ; palpi rather slender, white, the second 



joint touched with greyish fuscous above. Antennae white, annnlated 



with greyish fuscous, and having two rather wide but inconspicuous 



rings of greyish fuscous, the first about their middle, the second 



beyond it. 



Fore wings rather yellowish white, very slightly shaded or mottled 

 with pale greyish fuscous, especially beyond the middle ; a pale 

 greyish fuscous spot on the costa, at about one third from the apex ; 

 the costal, apical, and dorsal margins dotted with greyish fuscous ; 

 on the fold is a dark fuscous streak, commencing below the costa 

 near the base, widely interrupted below the middle of the cell, the first 

 portion slightly curved and more than twice as long as the second : 

 hind wings and their cilia grey. Underside greyish fuscous. 

 Expanse 19 millim. 



This is evidently the North-American representative of the Euro- 

 pean Plutella annulatella (Curtis), which it greatly resembles. It 

 differs in the ground-colour of the fore wings being yellowish white 



