268 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
with dusky (uniform cinnamon-rufous in P. ruficollis), In winter, 
upper parts usually nearly plain grayish brown or brownish gray. 
Range.—Northern Hemisphere, breeding northward; migrating far 
southward. (Nine or ten species.) ® 
KEY TO THE SPECIES OF PISOBIA. 
a. Larger (wing 114-146, tail 48-65 mm.). 
b. Median upper tail-coverts pointed at tip (subacuminate), the tailslightly rounded; 
tarsus not less than 24 (24-30), middle toe not less than 21 (21-25 mm.); rump 
and median upper tail-coverts sooty blackish. 
¢. Shaft of outermost primary wholly white, those of other primaries white at 
extreme (concealed) base only; foreneck and chest pale grayish brown 
conspicuously streaked with dusky brown. (North America, breeding 
northward; South America during migration.) ....Pisobia maculata (p. 269). 
ce. Shaft of outermost primary only partly white, those of other primaries white 
subterminally but not basally; foreneck and chest whitish or pale rusty, 
spotted with dusky. (Western Alaska and northeastern Asia, migrating 
to Australia, New Zealand, and Malay Archipelago.) 
Pisobia acuminata (p. 276). 
bb. Median upper tail-coverts not pointed, the tail double-emarginate; tarsus not 
more than 24 (20-24), middle toe not more than 21 (16-21 mm.), except 
in P. cooperi; rump and median upper tail-coverts not sooty blackish. 
c. Median upper tail-coverts dark grayish brown, like rump; scapulars variegated 
with pale grayish buff in summer. (North America, breeding northward; 
South Americain migration.) .......--.-----+-+-+-- Pisobia bairdi (p. 279). 
cc. Median (as well as lateral) upper tail-coverts white; scapulars variegated with 
grayish brown and cinnamon in summer. 
d. Smaller (wing 116.5-124, tail 50-57, exposed culmen 21-26, tarsus 22-24), 
(North America, breeding northward; South America during migration.) 
Pisobia fuscicollis (p. 284). 
dd. Larger (wing 146, tail 57, exposed culmen 31, tarsus 29). (Long Island, 
New York; only one specimen known.)......... Pisobia cooperi (p. 289). 
aa. Smaller (wing 82-104, tail 35-47.5 mm.). 
b. Middle toe, with claw, shorter than tarsus, little if any longer than exposed cul- 
men, the latter less than one-fifth as long as wing. 
c. Tail double-emarginate; all the primaries with shafts partly white; lateral rec- 
trices all pale brownish gray; summer adults strongly rufescent above; legs 
and feet blackish. 
d. Bill more slender; summer adults with throat and foreneck white, the latter 
flecked with grayish brown; winter plumage darker above. (Northern 
Europe and Asia, migrating to Africa, India, and Ceylon.) 
Pisobia minuta (extralimital).¢ 
a Tringa minuta Leisler, Nachtr. Bechst. Naturg. Deutschl., i, 1812, 74 (near 
Hanau on the Main); Naumann, Vég. Deutschl., vii, 1836, 391; Yarrell, Hist. Brit. 
Birds, ed. 2, iii, 1845, 66; ed. 3, 1856, 70; Macgillivray, Hist. Brit. Birds, iv, 1852, 
227; Dresser, Birds Europe, viii, 1871, 29, pl. 549, fig. 2, pl. 551, fig. 1.—Pelidna 
minuta Stephens, in Shaw’s Gen. Zool., xii, pt. i, 1824, 105.—Actodromas minuta 
Kaup, Natiirl. Syst., 1829, 55; Gould, Birds Great Brit., iv, 1870, pl. 72 and text.— 
Calidris minuta Cuvier, Régne Anim., ed. 2, i, 1829, 526.—Scheniclus minuta Gray, 
List Birds Brit. Mus., iii, 1844, 106.—Limonites minuta Sharpe, Cat. Birds Brit. Mus., 
xxiv, 1896, 538.—[Pisobia] minuta Lénnberg, Journ. fiir Orn., Oct., 1906, 533.— 
(?) Tringa minuta orientalis Taczanowski, Mém. Acad. Imp. St. Petersb., (7), xxxix, 
1893, 918. 
