58 REVIEW OF AMERICAN BIKDS. [PART I. 



Total length, 8.00 ; wing, 3.30 ; tail, 4.20 ; graduation, 2.00 ; exposed por- 

 tion of 1st primary, 1.27, of 2d, 1.90, of longest (measured from exposed base 

 of 1st 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 Turdidae 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 : — 



Tardus pinicola, Sclateb, Catal. 1861, 6, no. 36. Xalapa. 

 plelteius, Cabanis, Jour. 1860, 323. Costa Rica. 

 nigrescens, Cab. Jour. 1860, 325. Costa Rica. 



' Most authors admit of but one species in the genus Donacobius, placing 

 the Bolivian Z). 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. Donacollius atricapillus. Hab. Eastern South America. 



Turdus atricapillus, LiNif. S. N. I, 295. — Donacobius atricapillus, Bos. 



Consp. 277. — Bukmeister, Th. Bras. Aves, II, 129. 

 Turdus and Donacobius brasiliensis, vociferans, etc. 

 Fig. : SwAiNSON, Zool. 111. n. s. pi. xxvli. 



Specimens from Brazil. 



2. Donacoliius albo-Tittatus. Hab. Bolivia. 



Donacobius albo-vittatus, D'Okb. Mag. de Zool. 1837 19. 

 Donacobius albo-lineatus, D'Okb. Voyage, IX, Atlas Zoologique, 1847, 

 pi. xii.— BoK. Notes Delattre, 1854, 40. 



Specimens Nos. 16,832, 16,833. Bolivia, W. Evans. 



