194 
Wing 3 184-192, 2 205-218 mm. ; ¢ above 
*299a. 
299b. 
dark slate colour, with distinct black shaft- 
stripes, the head, mantle, and wing-coverts 
darker; hind neck mottled with rufous 
buff ; upper tail-coverts paler grey; tail 
black, tipped with whitish and crossed with 
3 slate grey bands; cheeks and throat 
whitish, with narrow streaks of black, 
except on latter ; below ochraceous buff to 
white, with blackish brown shaft-streaks, 
broadest on the flanks; thighs more reddish 
with narrow black stripes ; 2 much browner 
above ; tail umber brown with 4 incomplete 
buffish white bands. 
Falco columbarius suckleyi Ridgw., Bull. 
Essex Inst., v., p. 201 (1873). [Shoalwater 
Bay, Washington.) 
Suckley’s Merlin. 
Wing ¢ 186-191, 2 205-213 mm. ; g above 
much darker; head, mantle, and wings 
black ; rump and upper tail-coverts paler 
slate ; tail black, the grey bands nearly 
obsolete and hardly apparent on central 
feathers; below with markings heavier 
and darker; 9 above and below darker ; 
tail blacker, the light bars nearly obsolete 
on central feathers. 
Falco columbarius richardsom Ridgw., 
Proc. Acad. Nat. Sci. Philad., 1870, p. 145 
(1871). [Mouth of Vermilion River, S. 
Dakota. | 
Richardson’s Merlin. 
Wing ¢ 195-212, 9 205-225 mm. ; 3 above 
much paler bluish grey than F. c. colum- 
barius, with black shaft-lines to all the 
feathers; tail with 4 bands of greyish 
white, the intermediate black bars partly 
N.W. America 
(Sitka to Brit. 
Columbia) ; in 
winter S. cas. to 
Venezuela. 
Gt. Plains of W. 
North America 
(Saskatchewan 
Valley to 
N. Dakota) ; 
in winter to 
N.W. Mexico. 
