1869.] BIRDS FROM THE ARGENTINE REPUBLIC. 159 
2. PROGNE pomMEsTICA (Vieill.). 
Hirundo domestica, Vieill. N. D. xiv. p. 521, et E. M. p. 527; ex 
Golondrina domestica, Azara, Apunt. i. p. 502. 
Progne domestica, Baird, Rev. A. B. p. 282; Burm. La Plata- 
Reise, ii. p. 477. 
One skin of this species, which seems to us very nearly allied to 
. the Central-American P. Jeucogastra, though larger. Burmeister 
describes the adult as being steel-blue all over, having, we suppose, 
confounded it with the southern representative of P. purpurea (i. e. 
P. elegans, Baird, Rev. A. B. p. 751). 
3. Arricora CYANOLEUCA (Vieill.) ; Burm. J. c. p. 479. 
Golondrina timoneles negros, Azar. Apunt. ii. p. 508. no. 303. 
Two examples of this widely spread species. 
4, CycLoruis virgins (Vieill.); Burm. J. c. p. 472. 
Habia verde, Azara, 1. c. i. p. 361. no. 89. 
Sclater’s Bolivian specimen (C. A. B. p. 46) has a rather stronger 
bill, and the base of the lower mandible black. The chestnut eye- 
brows are also deeper in colour. It approaches C. flavipectus. The 
present species comes nearer the Brazilian C. ochrocephala, and has 
no black spot on the lower mandible. 
5. AGELASTICUS THILIUS (Mol.). 
Ageluius thilius, Burm. J. c. p. 492. 
Tordo negro cobyas amarillas, Azara, 1. ¢. i. p. 301. 
Agelasticus chrysopterus, Cab. M. H. i. p. 188. 
Agelaius canthocarpus, Cassin, P. Acad. Phil. 1866, p. 12. 
Two males and a female of this species, which we agree with 
Burmeister in regarding as hardly distinct from the Chilian bird. 
It only differs in its smaller size. The single Peruvian skin we have 
seen is most like the Chilian in size ; so that Bonaparte’s 4. zantho- 
carpus (ex Peruvia) is probably a mere synonym of ZA. thilius. Ca- 
banis wishes to call the Argentine form chrysopterus, from Vieillot’s 
Agelaius chrysopterus, which name, however, has no reference to 
Azara’s species, and is a mere synonym of Icterus cayanensis. 
6. XANTHOSOMUS RUFICAPILLUS (Vieill.). 
Tordo corona de canela, Azara, 1. c. i. p. 315. 
Agelaius ruficapillus, Vieill. 
Chrysomus frontalis, Burm. l. ec. p. 492. 
Dolichonyx ruficapillus, Cassin, Pr. Acad. Phil. 1866, p. 17. 
Cassin is quite right in separating this bird from the Brazilian Y. 
frontalis, with which it has been generally confounded. 
7. CYANOTIS AzAR#& (Licht.); Scl. C. A. B. p. 212. 
Tachuri rey, Azara, Apunt. ii. p. 72. no. 161. 
Two pairs of this species, which Mr. Hudson marks as a “ summer 
bird frequenting swamps.”’ Not mentioned by Burmeister. 
