NATURAL SCIENCES OF PHILADELPHIA. 
191 
1. Much the largest; length about 9 inches, wing (average) 5-25. 
Crown much darker than the hind neck, the transition abrupt. 
Chin immaculate. Edgings of feathers on upper parts light 
chestnut-red, not making indentations towards the shaft. Suf- 
fusion on jugulum very deep, the streaks narrow, distinct. 
Central tail feathers long, pointed, much projecting. Bill and 
legs dusky green, maculata. 
2. Smaller; length 7-25 inches, wing 4*8. Crown not conspicuously 
darker than hind neck. Edgings of feathers on upper parts 
light reddish yellow, scarcely brighter on the scapulars, making 
indentations towards the shaft. Suffusion on jugulum very 
light', the markings rounded, somewhat obsolete. Central tail 
feathers rounded, less projecting. Bill and legs black, Bairdii. 
3. Much the smallest; a miniature of the preceding; length 5-75; 
wing 3-4. Edges of feathers chestnut-red, usually more or 
less indented, tips lighter. Bill black, legs dusky green, minutilla. 
Heteropygia , Coues. 
B. Jugulum without an ashy or brownish suffusion. Upper tail coverts white. 
4. Length 7*5. Jugulum thickly streaked with rather narrow 
lines. Upper tail coverts immaculate, except the outer pair. 
Central tail feathers nearly black, considerably projecting, Bonapartei. 
5. Much larger; length 9-5. Jugulum with sparse, rather broad 
oval spots or streaks. Upper tail coverts with sagittate spots 
of dusky. Central tail feathers scarcely darker than the late- 
ral, projecting but little, Cooperi. 
Comparative Measurements of Species. 
V 
Name. 
Sex. 
Length. 
Extent. 
Wing. 
Bill 
above. 
Tarsus 
Middle 
Toe. 
Outer 
Toe. 
Coverts 
to end 
of tail. 
Central 
Feathers 
project.. 
A. maculata . 
9-00* 
5-35 
M2 
1-12 
1*12 
*90 
•80 
•52 
do. 
9 
8-50 
16%0 
5*00 
1*15 
1*10 
M2 
•92 
•80 
•40 
do. 
9*10 
18*20 
5*55 
1-20 
1*14 
1-14 
•92 
•90 
•42 
A. Bairdii. 
& 
7-15 
4*90 
•85 
*83 
•83 
‘70 
•60 
•20 
do. 
c?. 
7-25 
15*25 
4*85 
•86 
*88 
•88 
•72 
•50 
•15 
do. 
&. 
7-25 
15*25 
4-80 
•86 
•90 
*82 
•69 
•63 
*16 
A. minutilla. 
9 
3*35 
*74 
•69 
•78 
•61 
•45 
•18 
do. 
<? 
6-00 
11*30 
3*35 
•72 
•75 
•79 
•64 
•40 
•25 
do 
(9 
6-00 
12*00 
3-56 
•74 
*75 
•85 
•66 
•58 
•20 
A. Bonapartei. 
& 
7-40 
15*00 
4*70 
•94 
•98 
•95 
•8Q 
•80 
•29 
do. 
4-85 
•88 
•98 
•90 
•80 
•80 
•22 
do. 
c? 
7*40 
15*10 
4*80 
•95 
•92 
•91 
•75 
•75 
•22 
A. Cooperi. 
d* 
9*50 
5-75 
1-23 
1-14 
1-08 
•95 
•85 
•15 
Actodromas (Actodromas) minutilla (Vieill.) Coues. — Least Sandpiper, 
Tringa minutilla, Yieillot, Nouv. Diet. 1819, xxxiv. 452, (haud dubie.) “Yieill,” 
Gray, Genera, 1849, iii. 579. 
Tringa pusilla, Wilson, Am. Orn. 1813, v. 32, tab. xxxvii. fig. 4; id. Ord. Ed. 
1829, iii. 134; id. Brewer, Ed. 1840, 347, fig. 161. (Nec Linnsei; nec 
Meyer; nec Bechst.) Swainson, F. B. A. 1831, ii. 386. Audubon, Orn, 
Biog. 1838, iv. 320, tab. 180; id. Syn. 1839, 237 ; id. Birds Amer. v. 1842, 
*The measurements of the length and extent are from the fresh bird, and on the 
authority of the collector. 
1861.] 
