58 REVIEW OF AMERICAN BIRDS. [PART I. 
Total length, 8.00; wing, 3.30; tail, 4.20; graduation, 2.00; exposed por- 
tion of Ist primary, 1.27, of 2d, 1.90, of longest (measured from exposed base 
of Ist primary), 2.45; length of bill from forehead, 1.05, from nostril, .63; 
along gape, 1.26; tarsus, 1.32; middle toe and claw, 1.10; claw alone, .37 ; 
hind toe and claw, .90; claw alone, .43. 
The genus Donacobius has been variously placed by authors, by 
some among the Thrushes, by others among the Wrens. The notched 
bill, the bristled rictus, and above all the deeply parted toes, with 
the general coloration, appear however decidedly opposed to the 
latter view of its affinities; and I have accordingly inserted it here. 
It is a very strongly marked genus, and the only one of the family 
without any representatives in Northern or Middle America.* 
Having thus enumerated the species of Turdide from the region 
embraced in the present work, which I have had the opportunity of 
examining in the museum of the Smithsonian Institution, or else- 
where, I proceed to mention the remaining species which have been 
given by other authors. The names used are generally those of Dr. 
Sclater’s Catalogue of American Birds, where the precise synonymy 
will be found :— 
Turdus pinicola, Sciarer, Catal. 1861, 6, no. 36. Xalapa. 
plebeius, Casanis, Jour. 1860, 323. Costa Rica. 
migrescems, Cas. Jour. 1860, 325. Costa Rica. 
1 Most authors admit of but one species in the genus Donacobius, placing 
the Bolivian D. albo-vittatus, of D’Orbigny, as a synonym of D. atricapillus. 
Specimens in the Smithsonian collection, however, seem to indicate a decided 
difference in the much larger size of the Bolivian bird (length, 9.00; wing, 
3.50; tail, 4.50—instead of 8.25; 3.20; 4.00). There is also a very con- 
spicuous and distinct white stripe from the upper edge of the eye along the 
side of the head to the nape. This stripe is only faintly indicated, generally 
not at all in the atricapillus. The synonomy will be as follows :— 
1. Domacobius atricapillus. Hab. Eastern South America. 
Turdus atricapillus, Linn. 8. N. I, 295.—Donacobius atricapillus, Boy. 
Consp. 277.—BurmetsteR, Th. Bras. Aves, II, 129. 
Turdus and Donacobius brasiliensis, vociferans, etc. 
Fig.: Swarnson, Zool. Ill. n. s. pl. xxvii. 
Specimens from Prazil. 
2, Domacobius albo-vittatus. Hab. Bolivia. 
Donacobius albo-vittatus, D’OrB. Mag. de Zool. 1837, 19. 
Donacobius albo-lineatus, D’OrB. Voyage, IX, Atlas Zoologique, 1847, 
pl. xii.—Bon. Notes Delattre, 1854, 40. 
Specimens Nos. 16,832, 16,833. Bolivia, W. Evans. 
