2Y8 



EEVIEW OF AMEEICASr BIRDS. 



[PAKT I. 



This is a smaller species than the Progne furcala,^ from Chile 

 (9,112), with the tail, however, nearly as long and proportionately 

 almost as much forked. It is mucBi more richly colored, however ; 

 the concealed middle portion of the anal feathers white, not dark 

 brown, etc. The feet are much smaller. 



A Progne collected by Mr. Wright, alt Monte Verde, is duller in 

 color than that from Remedios, but has still more concealed white 

 below, in the median portion, not only of the anal feathers, but of 

 those of the entire erissum and of the belly. A female bird, which 

 I presume to be the same species, can scarcely be distinguished from 



' Progne furcata. 



Progne furcata^ Baibd, b. s. 

 Hab. Chile (and other parts of western South America?). 



(No. 9,112, %.) Color as in P. subis, with rather more of a purple gloss. 

 Basal portion of the feathers in the anal region dark brownish, without trace 

 of the whitish of P. subis. Tail deeply forked (for over an inch). 



Measurements : Total length, 8.30 ; wing, 5.80 ; tail, 3.60 ; perpendicular 

 depth of fork, 1.06 ; difference between primaries, 2.70 ; length of bill from 

 forehead, .50, from nostril, .32 ; along gape, .90 ; width, .60 ; tarsus, .60 ; middle 

 toe and claw, .90; claw alone, .25 ; hind toe and claw, .51 ; claw alone, .24. 



This species is like /-". subis, but differs appreciably from a large series of 

 specimens in a considerably longer tail (3.60, instead of 3.40), and a much 

 deeper fork (1.06, instead of .75.) The bill is considerably narrower than the 

 average of subis, though not more so than in one specimen (4,773) from the 

 upper Missouri. The concealed portion of the feathers about the anal region 

 is much darker than in subis. The size, except of tail, is about the same. 



This is probably the species to which Gray (Cat. Br. Mus.) refers as P. 

 modesta {concolor), from Chile. The P. concolor, the synonyms of which I 

 give below, is a very much smaller species, with the tail less forked than in 

 subis, instead of much more so, and is probably peculiar to the Galapagos. 



Progne concolor. 



Hirundo concolor, GonLD, P. Z. S. 1837, 22 (James IsL, Galapagos). 



Progne modesta, Godld, Birds Beagle, 39, pi. v. (Same specimen.) 

 Hab. Galapagos Islands. 



Length, 6'' ; wings, 5^ ; tail, 2| ; tarsus, J ; middle toe (without claw ?), .35. 

 Less purple than purpurea. Tail less forked. Nostrils less ; bill much the 

 same. Feet much less strong. 



