THE CANADIAN ENTOMOLOGIST. 99 



The ground colour of the wings and abdomen is like that of S. 

 gra7iiiata^ and I think that I should probably have passed over ptircellata 

 as a small race oi gran it at a but for the fact that the last named is a very 

 common insect at Kaslo, normally very large and dark, and not appearing 

 to intergrade in any way with the species under discussion. 



The head and collar in purcellata are tinged with ochreous, the 

 abdomen is grayish, with faint brown twin spots dorsally, and by this last 

 character /?/rr^//(2!/rt can be distinguished readily from the species of the 

 lieliothidata or califortiiata groups, all of which have the abdomen 

 unspotted. 



The fore wing is crossed by the usual three lines, but they are firmer 

 and less wavy than is usually the case in granitata ; this is especially 

 noticeable in the extra-discal line. 



Beyond the extra-discal line is a broad and distinct dark shade, which 

 includes and obscures the dark blotch between veins 3 and 5. 



The dark shade is followed outwardly by a rather distinct white line. 

 The marginal line of blackish spots, generally so well marked m gra?ulata^ 

 is hardly visible. 



The hind wing is heavily speckled with darker gray, and an irregular 

 line is traceable as in granitata. 



The discal spots on the fore wings are obsolete, and on the hind 

 wings are very small and faint. 



Beneath, all the wings are speckled and mottled with ochreous^ and 

 on the fore wing there is a median line and an extra-discal band of the 

 same colour, each bordered outwardly by a broken white line. 



On the hind wings there are also two* lines, median and submarginal, 

 quite distinct. The discal dots on all the wings are minute. 



It will be seen \\\dX purcellata is most nearly allied to granitata, but 

 I think that the small size, the plainer and more regular markings, and the 

 other slight differences noted above, will serve to distinguish it. 



In order to make this paper more complete as a supplement to the 

 Oeometrid portion of Dr. Dyar's excellent " Lepidoptera of the Kootenai 

 District of British Columbia" (Proc. U. S. Nat. Mus., XXVII, 779-938, 

 1904), I append a list of the corrections and alterations, which, after the 

 study of more abundant material than Dr. Dyar possessed, I think should 

 be made in the nomenclature of the species noticed in that paper. 



It must not be thought that all these are cases of misidentification on 

 the part of Dr. Dyar, for in many instances they are simply restorations 

 pf older names brought to light since the publication of his paper. 



