494 
U. S. P. R, R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
This genus comes nearer to Calamospiza, but has shorter tertials, more slender hill, weaker 
and more curved claws, &c. 
Synopsis of species. 
Top and sides of head light slate ; forehead tinged with greenish yellow. A superciliary 
stripe, a maxillary spot, sides of breast, and middle line of breast and belly, yellow. Chin 
white, throat black, shoulders chestnut. Female with the black of the throat replaced by a 
crescent of spots......... E. americana. 
Body throughout, (including the jugulum,) dark ash, tinged with brownish on the hack and 
wings. Superciliary and maxillary stripe, chin, throat, and middle of belly, white. A maxil¬ 
lary line and a pectoral crescent of black spots. No chestnut shoulders. ,...E. toivnsendii. 
Under the head of Cyanospiza , page 500, will be found some remarks upon the genera Euspiza 
and Spiza, of Bonaparte. The name of Spiza was first used in connexion with the Emberiza 
americana , hut so mixed up with types of several other modern genera as to render it uncertain 
whether to apply it to one rather than another. Under the circumstances, therefore, it may be 
best to retain Euspiza, although if Spiza pointed more unmistakeably to the E. americana it 
might, perhaps, be necessary to adopt it. 
Comparative measurements of species. 
Catal. No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch of 
wings. 
Wing. 
Tail. 
Tarsus. 
Middle toe. 
Its claw 
alone. 
Hind toe 
and claw. 
Hind claw 
alone. 
Bill above. 
Along gape. 
Specimen 
measured. 
1459 
3 
6.06 
3.26 
2.80 
0.90 
0.90 
0.26 
0.67 
0.30 
0.53 
0.60 
6.66 
10.75 
3.42 
9266 
5.84 
3.34 
2.68 
0.90 
0.90 
0.24 
0 66 
0.30 
0.57 
0.66 
6.50 
10.50 
3.50 
10133 
Q 
5.52 
2.98 
2.50 
0.80 
0.80 
0.23 
0.60 
0.28 
0.52 
0.56 
10282 
2.86 
2.56 
0.80 
0.80 
0.23 
0.53 
0.24 
0.48 
0.56 
5.75 
9.00 
EUSPIZA AMERICANA, Bonap. 
Black-throated Bunting. 
Emberiza americana, Gmelin, Syst. Nat. I, 1788, 872.— Wilson, Am. Orn. Ill, 1811,86; pi. iii, f. 2.— Audubon, 
Orn. Biog. IV, 1838, 579; pi. 384!— Ib. Syn. 1839, 101.— Ib. Birds Amer. Ill, 1841,58 ; 
pi. 156. 
Fringilla (Spiza) americana, Bonap. Obs. Wils. 1825, No. 85. 
Euspiza americana, Bonap. List. 1838. (Type.)— Ib. Conspectus, 1850, 469. 
Eiispina americana, Cabanis, Mus. Hein. 1851, 133. (Type.) 
Fringilla flavicollis, Gmelin, Syst. Nat. I, 926. 
“ Emberiza mexicana, Latham,” Syn. 1, 1790, 412. (Gray.) 
Passerina nigricollis, Vieillot. 
Yelloiv-throated finch, Pennant, Arc. Zool. II, 374. 
Sp. Ch. — Male. Sides of the head, and sides and back of the neck ash ; crown tinged with yellowish green and faintly 
streaked with dusky. A superciliary and short maxillary line, middle of the breast, axillaries, and edge of the wing yellow. 
Chin, loral region, spots on sides of throat, belly, and under tail coverts white. A black patch on the throat diminishing to 
the breast, and a spot on the upper part of the belly. Wing coverts chestnut. Interscapular region streaked with black; rest 
ofback immaculate. Length, about 6.70 ; wing, 3.50. » 
Female with the markings less distinctly indicated ; the black of the breast replaced by a black maxillary line and a streaked 
collar in the yellow of the upper part of the breast. 
Ilab. —United States from the Atlantic to the border of the High Central Plains. 
