44 BITLIETIK 50, UNITED STATES NATIONAL MTTSEtTM. 



or grayish sooty, the feathers with narrow and (except on under tail 

 coverts) usually indistinct narrow terminal margins of paler; bill, etc. 

 as in adult male; length (skins) 136-161 (146.7); wing, 11.5-122 (118.5) 

 tail, 65-61 (69), forked for 12-14 (13); exposed culmen, 9.5-10 (9.9) 

 width of bill at frontal antise, 7-8 (7.7); tarsus, 11-12 (11.7); middle 

 toe, 12-12.5 (12.2).« 



Galapagos Archipelago (Charles, Indefatigable, James, Albemarle, 

 Chatham, Barrington, and Duncan islands). 



Hirundo concolor (not of Sykes, 1832) Gould, Proc. Zool. Soc. Lend., 1837, 22 

 (Galapagos Archipelago; coll. of Zool. Soc. Lond.). 



IProgne] concoZor Bonaparte, Consp. Av., i, 1850, 337. 



Progne concolor Baied, Review Am. Birds, 1865, p. 278.— Salvin, Trans. Zool. 

 Soc. Lond., ix, pt. 9, 1876, 476.— Sharpe, Cat. Birds Brit. Mus., x, 1885, 

 176 ("Chatham I.")*.— Eidgway, Proc. TJ. S. Nat. Mus., xii, 1889, 105 

 (Eden Rock, Indefatigable I.); xii, 1890, 105 (Indefatigable I.).— Roths- 

 child and Hartert, Novit. Zool. , vi, 1899, 152 (James, Charles, Indefatigable, 

 Chatham, Barrington and Albemarle islands); ix, 1902, 386, 417 (Gardner 

 Bay, Hood I.; Daphne I.; Eden I., near Indefatigable; Chatham I.; Tagus 

 Cove, Albemarle I. ; habits; descr. eggs) . — Sharpe and Wyatt, Mon. Hirund., 

 1894, 463, 487, pi. 90. 



Progne subis, var. concolor Baird, Brewer, and Ridgway, Hist. N. Am. Birds, i, 

 1874, 328. 



Hirundo modestal^EBOvx, Rev. Zool., 1840, 291 (Charles I. ).—Sundev all, Proc. 

 • Zool. Soc. Lond., 1871, 125 (James I.). 



Progne modesta Gould, Zool. Voy. Beagle, iii, 1841, 39 (James I., Galapagos). — 

 Pkevost and Des Murs, Voy. V^nus, 1855, 182. — Ridgway-, Proc. IT. S. Nat. 

 Mus., xix, 1897, 505 (Charles, Indefatigable, and James islands). — Baur, 

 Am. Nat., xxxi, 1897, 782 (Albemarle and Duncan islands), 783 (Barrington, 

 and bet. Barrington and Indefatigable islands). 



Progne modesius Gould, Zool. Voy. Beagle, iii, 1841, pi. 5. 



Genus PETROCHELIDON Cabanis. 



Petrochelidon I' Cab.\nis, Mus. Hein., i, .1850, 47. {Tyjie, Hirundo melanogaster 



Swainson. ) 

 (?) Hylochelidon Gould, Handb. Birds Australia, i, 1865, 111. (Type, Hirundo 



nigricans Vieillot. ) 

 (?) Lagenoplastes Gould, Handb. Birds Australia, i, 1865, 113. (Type, Collocalia 



ariel Gould. ) 

 (?) Anirochelidond Baldamus, Journ. fiir Orn., xvii, Nov., 1869, 406. (Type, 



Hirundo nigricans Vieillot. ) (Cited by Sharpe and Wyatt as Amnochelidon. ) 



Small or medium-sized Hirundinidse with the nostrils roundish and 

 opening superiorly, the tarsus shorter than middle toe (without claw), 

 middle toe united to outer toe for about half its basal phalanx, tail 



o Four specimens. 



!> Although Dr. Sharpe gives Chatham Island as the locality of Darwin's specimen, 

 Mr. Darwin himself says he obtained it on James Island. 

 ""Von Tcirpa, Pels, Klippe, und ;(«Az5ffi»', Schwalbe." 

 ^¥TOTa''Avrpov, a cavern; ;t;£Ai5(»j', swallow. (Richmond.) 



