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country, of another species of the same group, we think proper to 
introduce it regularly into the Fauna of the United States. 
SUBGENUS I. bis. BUBO. 
Bubo , Syrnium, Sav. Cuv. 
Conch of the ear moderate, oval, with a membranous oper- 
culum. Feet thickly covered to the claws with short feathers. 
* Head tufted. (Bubo, Cuv.) 
Disk of feathers not well marked. 
27. Strix virginiana, Gm. 
** Head not tufted. (Syrnium, Cuv.) 
Disk of feathers perfect and well marked. 
27. bis. Strix cinerea, Gm. Dark brown mottled with whit- 
ish ; face white, with black concentric circles ; tail reaching 
beyond the wings ; both fasciated, the bands mottled ; bill 
yellowish-white ; irides yellow. 
Cinereous Oivl, Strix cinerea, JYob. Am. Orn. pi. 23. jig. 2. 
Strix lapponica ? Retz ? Temm ? 
Inhabits Arctic America : an accidental winter visitant of 
the north-western territory : common throughout the year at 
Hudson’s Bay : found in winter at Fort William on Lake 
Superior. Length more than two feet. The largest Ameri- 
can species. 
Note 6. Strix acadica. On a recent examination of this bird, 
I ascertained that the auricular conch and its operculum, are as 
large as in any of the genus, by which it may at once be known 
from S. passerina. We cannot sufficiently regret, that authors 
should be so unanimous in neglecting this important character of 
the ears in owls. Owing to this neglect, we are unable, even at the 
present moment, to decide whether our S. acadica is the S. aca' 
dica , or S. Tengmalmi of Temm. and other modern authors. 
Note 6. Strix flammea. S. bubo, and S. plialcenoides of 
Baud, are also indicated by Say in Long’s Ex. and several other 
species are stated to inhabit North America. We have also heard 
Mr. Audubon mention a small species with a deeply forked tail ! 
