THE CANADIAN ENTOMOLOGIST. 189 
and proceeds to the dorsal margin at the apex. The discal cell is wide 
towards the end and the subcostal comes down obliquely towards the 
middle of the wing, from its second branch to its apical one. The cell is 
closed by a curved discal vein which gives off two branches to the dorsal 
margin. The median vein is nearly straight to the end of the cell, where 
it is deflexed to the dorsal margin, after having given off two branches 
from near the end. The median is furcate at the apex and attains the 
dorsal margin about the middle. 
(This description is according to Dr. Clemens’ system of nomenclature 
of the neuration. A more intelligible description, with the sketch of the 
wing before me, would be—median nearly straight to the end of the cell, 
which is widest near the end and is closed by the oblique curvature of the 
costal vein to its junction with the median. Nine branch veins are given 
off from the cell, the first from about the middle of the subcostal and 
three others from about the end of the cell, all going to the costal margin, 
the last one at the apex; four other branches to the dorsal margin from 
about the end of the cell, and one from the median before the end of the 
cell.) 
Posterior wings lanceolate, or rather wedge-shaped, the costa slightly 
excised from the apical third; the costal vein attains the margin at the 
excision ; the subcostal distinct from the end of the cell to the apex, faint 
before the end of the cell ; the discal cell closed by a faint rather long 
oblique discal vein which gives off two branches to the dorsal margin, the 
superior branch being faintly continued through the cell to the base, the 
inferior branch is given off close to the median, which is three branched, 
the two last being approximate in their origin ; submedian distinct; cell 
very wide. 
Œ. boreasella. N. sp. 
Palpi reddish brown ; antennae dark brown, annulate with white 
Primaries bright golden; a reddish brown spot margined behind with 
white crosses the base and is continued along the extreme costa nearly to 
the apex. About the basal fourth is a large costal red brown spot white 
margined behind, and about the middle is a larger one margined with 
white before and behind; opposite the space between these two spots is 
a larger dorsal red brown spot, white margined before and behind, its 
white margin being continuous with the white margin of the second costal 
spots. It is also connected with cach of the costal spots by a narrow red 
