592 MESSRS. DRESSER AND SHARPE [June 23, 
Collyrio borealis, Baird, B. of N. Amer. p. 324 (1858) ; Coop. & 
Suckl. Pac. R. Rep. xii. pt. 2, p. 188 (1860); Baird, Rev. N. Am. 
B. p. 440 (1864) ; Coues, Proc. Phil. Acad. 1866, p. 73; Lord, Nat. 
in Vane. Isl. ii. p. 295 (1866); Sam. B. of N. Engl. p. 269 (1867) ; 
Gray, Hand-l. of B.i. p. 391 (1869). 
Lanius septentrionalis, Bonap. Sp. Comp. p.30 (1827); ¢d. P.Z.8. 
1837, p. 112; id. Consp. Gen. Av. i. p. 363 (1850); td. Rev. et 
Mag. 1853, p. 294; Cass. Proc. Phil. Acad. 1857, p. 213; Murray, 
Edinb. N. Phil. Journ. ix. p. 223 (1859). 
Tanius excubitor (err.), Forst. Phil. Trans. Ixii. p. 382 (1772) ; 
Wils. Amer. Orn. i. p. 74 (1808) ; td. ed. Jard.i. p. 73 (1832) ; 
Aud. Orn. Biogr. ii. p. 534 (1834). 
Above French grey, paler on the lower back as it approaches the 
rump, which, with the upper tail-coverts, is pure white; a narrow 
line of white extends across the forehead; ear-coverts jet-black ; 
scapulars pale grey, tipped with white; least wing-coverts grey, 
tinged with rusty ; wing-coverts black, the outer ones tinged with 
brown; quills dark blackish brown, white at the base of the inner 
web, the base of the outer web of the primaries white, showing a 
small white alar bar; secondaries tipped with white ; tail black, all 
the feathers, except the two centre ones, white at the extreme base, 
and all tipped with white, this colour occupying more of the apical 
portion of each feather till the outermost, which are white along 
the outer edge and for the greater part of the inner web; under 
surface dull white, minutely barred with narrow transverse vermi- 
culations, which become less distinct towards, and are sometimes 
absent on, the lower abdomen and under tail-coverts ; bill dark horn- 
brown ; feet black. Total length 9 inches; of bill from front 0-7, 
from gape 1'1 ; wing 4°5; tail 4-2; tarsus 09. 
Female. Similar to the male, but has all the colours less intense, 
and the whole plumage tinged with ashy brown. There is also, 
perhaps, not quite so much white on the tail. 
This is the most powerful species of the genus Lantus, and possesses 
a most extended range, as it is known to inhabit the whole of the 
North-American continent from the extreme north down as far south 
as the Mississipi and Missouri valleys. With regard to its possible 
occurrence in North-castern Asia, we adduce the following facts, 
which are likewise referred to by Prof. Baird (Rev. Am. B. p. 442). 
Pallas (Zoogr. Rosso-As. i. p. 401) describes a large Grey Shrike 
which he obtained on the Lena and Jenesei rivers, and which he 
considers to be different from Lanius exeubitor. All ornithologists 
seem to coincide in the same opinion, viz. that the Lanius major of 
Pallas is only a large race of L. excubitor; but after comparing 
skins of the North-American Z. borealis carefully with Pallas’s de- 
scription, we think that there is every reason to believe that this 
was the bird intended by the above author. Nor is there any 
improbability in this supposition ; for the recent observations of orni- 
thologists are proving the great similarity of the faune of Eastern 
Siberia and North-Western America, and we now know that many 
species are common to these two localities. At all events it seems 
