298 THE CANADIAN ENTOMOLOGIST 



Both species have usually a fuscous transverse bar or shade through 

 the outer portion of the median pale band on the primaries in both 

 sexes. This is normally very distinct, and I have no specimens in 

 which it is not at least traceable. In the males only of both, this 

 bar or shade is sometimes chestnut brown, and when best de- 

 veloped this is very conspicuous, as it is the only portion of the 

 fore wing, and that almost of the palest ground, in which this color 

 appears. In hudsonica this takes somewhat the form of a bar with 

 well-defined edges, and may consist of a broadly geminate waved 

 brown line, with the included space paler brown. In Xo. 42-i, 

 though often broader, it has ill-defined edges, coalescing gradually 

 with the pale ground. 



But the most obvious superficial difl'erence between the forms 

 is seen in the females. Whereas in hudsonica this se.x has the 

 primaries much greyer and mxTe even, with the maculation par- 

 tially obsolete or ill-defined, in No. 424 the sexes are alike, with 

 the exception that in neither case is the brown-barred variation 

 found in the females, at least so far as I have yet observed. 



In the Kootenai List, Dr. Dyar referred to the brown-barred 

 form as var. seposita Hy. Edw., and I found a series of such 

 forms separated under that name in the Washington Museum. I 

 saw a male type of seposita, from Colorado, in the Henry Edwards 

 collection. It certainly seemed near this form, and may be the 

 same, though I did not compare a specim.en, and do not feel at all 

 convinced of its identity. There is another male type in the Neu- 

 moegen collection. 



The ground color of the secondaries of hudsonica is pale creamy 

 white. In No. 424 it is darker, a trifle ochreous, sometimes slightly 

 orange. Holland's Plate XXX., fig. 31, under hudsonica, is ap- 

 parently this form, and I can match it very closely in my collection. 



It is quite possible that this is a somewhat similar example of 

 what I believe to be racial variation in petricola and alhabasca, and 

 that hudsonica is easily influenced by environment and has de- 

 veloped strongly marked races in localities no great distance apart. 



430. Philometra metonalis Walk. — The type is a male from 

 St. Martin's Falls, Hudson Bay Territory. It is a very even 

 specimen, and has scarcely any trace of transverse lines. Gaosalis 



