224 HIRUNDINIDZ. 
that the Mexican birds accompany the more northern ones in their winter migration. 
Against this theory is Prof. Sumichrast’s observation that this bird is resident in the 
higher parts of Vera Cruz. 
Our specimen from British Honduras has rather more white on the base of the 
under tail-coverts than is the case in one we have from California; it may therefore 
belong to the Cuban bird separated by Prof. Baird as Progne cryptoleuca; but the 
difference is, in our opinion, of no specific importance. 
The Purple Martin is a very familiar bird in North America; and a full summary of 
the records of its habits is given by Brewer. It breeds in convenient places in 
many of the public buildings in the towns and cities of the United States, and also in 
suitable boxes placed for the purpose near their dwellings by all classes of people. 
It also breeds in South America, as Darwin states that he observed females at Bahia 
Blanca beginning to lay in September, having excavated deep holes in a cliff of 
compact earth +. 
An excellent account of it at this season is also given by Mr. W. H. Hudson !. 
As P. purpurea is migratory at both ends of its range, and as it breeds both in the 
northern and southern continents, the question arises whether the species raises two 
broods in the year, one in the summer months in the north, and another in the winter 
in the south, or do the birds of each extremity occupy alternately an intermediate 
country in common t—questions only to be answered by the closest observation of the 
movements of the birds themselves. | 
2. Progne chalybea. 
Hirundo chalybea, Gm. Syst. Nat. 1. p. 1026". 
Progne chalybea, Lawr. Ann. Lyc. N.Y. vii. p. 8187; Cab. J. f. Orn. 1860, p. 402°; Scl. & Salv. 
P. Z. 8. 1878, p. 258*, 1879, p. 495 ’. 
Progne purpurea (non Linn.), Cab. in Schomb. Reise n. Guian. iii. p. 671°. 
Progne dominicensis (nec Linn.), Burm. Syst. Ueb. iii. p. 141"; Scl. P.Z.S. 1857, p. 201°; 1859, 
p. 864° ; 1860, p. 292°; Scl. & Salv. Ibis, 1859, p. 13”; Taylor, Ibis, 1860, p. 110”; 
Owen, Ibis, 1861, p. 61°. 
Hirundo domestica, Vieill. N. Dict. d’ Hist. N. xiv. p. 520 (ex Azara) ™. 
Progne domestica, Pelz. Orn. Bras. p. 17”. 
Progne leucogaster, Baird, Rev. Am. B. i. p. 280°; Salv. Ibis, 1866, p. 203°"; Lawr. Ann. Lye. 
N.Y. ix. p. 96°; Sumichrast, Mem. Bost. Soc. N. H. i. p. 547°; v. Frantzius, J. £. Orn. 
1869, p. 294°°; Scl. & Salv. P. Z. 8. 1867, p. 569”; 1870, p. 888”; Lawr. Bull. U.S. Nat. 
Mus. no. 4, p. 17. 
Supra chalybeo-cerulea unicolor, alis caudaque nigricantibus chalybeo extus lavatis ; subtus fusca, abdomine et 
crisso albidis, macula hypochondriaca celata alba; rostro et pedibus nigris. Long. tota 6°5, ale or, 
caude rectr. med. 2°25, rect. lat. 2-9; rostri a rictu 0:9, tarsi 0-45. (Descr. maris ex San Geronimo, 
Guatemala. Mus. nostr.), 
Q mari similis, sed colore corporis supra obscuriore. (Descr. femine ex Cahabon, Guatemala. Mus. nostr.) 
Hab. Mexico, San Andres Tuxtla (Sallé*'%), Jalapa (de Oca®), hot and temperate 
regions of Vera Cruz (Sumichrast®), Tehuantepec (Grayson 2), Barrio (Sumi- 
