BIRDS — IIIRUNDINIDAK — COTYLK SERRIPENXI8. 



313 



COTYLE RIPARIA, Boic. 



liuuk Swallow. 



//irtiiido rijjoria, Lin'.s'aeus, Syst. Nat. I, n(i6, 344. — Wilson, Am. Orn. V, AS ; pi. x.xxviii. — Acuubon, Orii I3iog. 



IV, 1838, 584 ; pi. 385.— Ib. Syii. 1839.— Ib. Birds Am. I, 1840, 187 ; pi. 50. 

 Cotytc riporio, Boie, Isis, 1822, 550.— Bon. List, 1838.— Cassin, Illust. I, 1855, 247.— Brewer, N. Am. Ool. 1, 1857, 



105 ; pi. iv. fig. 49, (egg.) 

 " Hirvndo cinma, Vieillot, Nout. Diet. XIV, 1817, 526." 



Sr. Ch. — Smallest of American swallows. Tail slightly omarginate. Outer web of first primary soft, without hooks. Lowei 

 part of the tarsus with a few scattered feathers. Above grayish brown, somewhat fuliginous, with a tendency to paler margins 

 to the feathers. Beneath pure white, with a band across tho breast and sides of the body like the back. Length, 4.75 ; wing, 

 4.00; Uil, 2.00. 



ici generally. 



A specimen collected by Dr. Heermann iu the Sacramento valley is rather smaller than Penn- 

 sylvania ones, and the brown band across the throat is broader and more continuous. Skins 

 from the Upper Missouri are rather larger than from either side of the continent, and the colors 

 purer and more continuous ; the tail and wing feathers without the white edging. 



The young of the year are not conspicuously different from the adults, save in tlie greater 

 amount of light edging to the feathers on the back. The tail is less einarginate. 



This species is supposed by most authors to be identical with the European bank swallow, 

 careful comparisons having liitherto failed to exhibit any tangible difference. It furnishes 

 almost a solitary instance, among land birds, of the same species inhabiting both continents 

 permanently, and not as an accidental or occasional visitor on either. 



List of specimens. 



COTYLE SERRIPENNIS, B o n a p . 



Rough'winged Swallow. 



Hirundo serripennis, ArD Orn. Biog. IV, IS.^S, 593.— . Birds America, 1, 1840, 193 ; pi. 51. 

 Co(i/(e serripcnnis, Bonap. Consp. 1850, 342. — Cassin, Illust. 1, 1855,247. — Brewer, N. Am. Oology, 1, 1857, 

 106 ; pi. iv, fig. 50, (egg.) 

 Sp. Ch. — Tail slightly emarginate ; first primary with tho pennulae of the outer web much stiffened, with their free extremities 

 recurved into a hook very appreciable to the touch. No feathers on the tarsus and toes. Above rather light sooty brown, 

 beneath whitish gray, or light brownish ash, becoming nearly pure white in the middle of the belly and on tho under tail 

 covtrts. Length, 4.50; wing, 4.28 ; tail, 2.23. 

 Hab. — United States from Atlantic to Pacific. 



Specimens vary in having the belly of a purer white, and in the greater or less intensity of 

 the ashy brown of the throat and breast. 

 40 b 



