176 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



the fact that it agrees with the latter in the rich and nearly pure yellow 

 of the back, and large size, although the dimensions are but little 

 greater than those of the largest of the South American series, the wing 

 measuring 3.90 and the tail 3.75 inches. 



In conclusion, assuming that there may be two separable races of this 

 species belonging respectively to Middle America and Northern South 

 America, east of the Andes — a point regarding which I must confess 

 myself as not quite satisfied — their synonymy may be arranged as fol- 

 lows: 



Icterus xanthornus. 



a. xanthornus. 



Oriolus mexicanus (part) Linn. S. N. ed. 12, i, 1760, 162, No. 13, but not No. 8, on 



same page (based on Edw. pi. 243=/. leucopteryx, and Xanthornus mexicanus 



Briss. Orn. ii, pi. 11, fig. 2=the present species). — Bodd. Tabl. P. E. 1783, 1 



(based PI. Enl. No. 5, fig. 1). 

 Icterus mexicanus "Briss." Bonap. Coinpt. Rend. 1853,835. — Prevost & Lkmaire, 



Ois. Ex. 131, pi. 70, upper fig. 

 Oriolus xanthornus Gmel. S. N. i, 1788, 391 (=Oriolus mexicanus No. 13, Linn.+PI. 



Enl. No. 5, fig. 1). 

 Icterus xanthornus, Daud. Tr. Orn. ii, 1800 334, (part; includes/, leucopteryx). 

 Agelaius xanthornus Vieill. Nouv. Diet, xxxiv, 1819, 543 (part). 



Psarcolius xanthornis Wagl. Syst. Av. 1827, No. 15 (first elimination of 1. leucopteryx). 

 ? Icterus xanthornus, var. a. dubusii, Dubois, Bull. Ac. Roy. Belg. ser. 2, xl, Dec. 1875, 



16 (Isth. Panama). 

 Icterus xanthornus, var. (5. marginalis, Dubois, Bull. Ac. Roy. Belg. ser. 2, xl, Dec. 



1875, 17 (Istb. Panama). 

 Icterus auratus Cass. Proc. Philad. Acad. 1867, 50 (Mexico; spec'n in Nat. Mus. coll.). 



[i. linncei. 



Agelaius xanthornus Vieill. Nouv. Diet, xxxiv, 1819, 543 (part). 



Xanthornus linncei Bonap. Consp. i, 1850, 434(Cayenne; "Antilles"; Colombia). 



f Xanthornus nigrogularis Hahn, Vog. pt. v, 1820, 1, pi. 1 (" Mexico")— Bonap. 

 Compt. Rend. 1853, 835. 



Icterus xanthornus Caban., in Scbomb. Guiana, iii, 1848, 680; Mus. Hein. i, 1851, 

 185 (Venezuela; Guiana).— Burm., Syst. Ueb. iii, 1856, 269.— Scl., Catal. 

 1861, 133, No. 808 (Trinidad ; Cayenne ; New Granada) ; Ibis, 1883, 368 (coast- 

 reg. of Colombia, Venezuela, and Guiana, to tbe Rio Brancbo, Trinidad). — 

 Taylor, Ibis, 1864, 84 (Trinidad).— Cass., Pr. Pbil. Ac. 1867, 50 (Venezuela; 

 Trinidad ; Cayenne ; N. Brazil).— Scl. & Salv., P. Z. S. 1868, 167 (Venezuela) ; 

 Norn. Neot. 1873, 36.— Wyatt, Ibis, 1871, 329 (Sta.Marta, N. G.).— Salvin & 

 Godm. Ibis, 1880, 123 (Sta.Marta, Colombia).— Finsch, P. Z. S. 1870, 578 

 Trinidad).— Pelz. Orn. Bras, 1871, 195. 



4. Zenaida ruficauda, Bonap. ? 



Or sp. nov. Zenaida vinaceo-rufa, Ridgw. ? 



An adult female Zenaida (No. 97933, U. S. Nat. Mus.) is perhaps refer- 

 able to Bonaparte's Z. ruficauda (Consp. II, 1854, 83), described as from 



