7S CYrsTain.T:. 



Two eggs of the Siberian Spine-tailed Swift measure respectively : 

 1-22 by -75 ; 1-2 by -75. 



2. Sega, N. Mongolia (A. Riickheil). Crowley Bequest. 



Chaetura zonaris (Shaw). 



Plemiprocne zonaris, Scl. ^- Salv. P. Z. S. 1879, p. 531 ; Scl. Sf Huds. 



Arc/ent. Orn. ii. p. 11 (1889). 

 Chaetura zonaris, Hartert, Cat. Birds B. M. xvi. p. 476 (1892) ; 



Sah\ ^ Godm. Biol. Centr.-Amer., Aves,i\. ^. Z'i'^, (189:}); Nehrk. 



Kat. Eiersamml. p. 154 (1899); Shaijje, naml-l. il -p. ^l (1900); 



von Iheri/iy, liev. Mus. Paulista, p. 255 (1900). 



The eggs of the Ringed Spine-tailed Swift in the Collection 

 measure 1-28 by -88 ; i'27 by -88 ; 1'29 by '85 respectively. 



1. Froutino, Antioquia, U.S. Colombia Salviu-Godman Coll. 



{T. K. Salmon). 



2. Colombia. Crowley Bequest. 



Chaetura pelagica (Linn.). 



Iliruudo pelasgia, Thien. Fortpflanz. ges. Vog. tab. xlii. fig. 5 (1845-54). 

 Acanthvlis pelasgia, Bretver, N. Amer. Ool. pt. i. p. 108, pi. iv. tig. 51 



(18"56). 

 Chaetura pelagica, Baird, Brewer i^- liidqiu. N. Amer. Birds, ii. p. 432 



(1874); Hartert, Cat. Birds B. M'. xvi. p. 480 (1892) ; Bendire, 



Life-Hist. K. Amer. Birds, ii. p. 177, pi. i. fig. 25 (1895) ; Nehrk. 



Kat. Eiersamml. p. 154 (1899) ; Sharpe, Hand-l. ii. p. 92 (1900). 



The eggs of the American Chimney-Swift measure from '75 to -85 

 in length, and from "49 to '55 in breadth. 



1. North America (Smiths. Inst.). Salvin-Godman Coll. 



2. North America (Henshaio Coll.). Salvin-Godman Coll. 

 (J. North America. Crowley Bequest. 



3. North America (Tristram Coll.). Crowley Bequest. 



Chaetura vauxi (Toums.). 



Chretura vauxi, Baird, Brewer Sy Bidr/w. N. Amer. Birds, ii. p. 4.35 

 (1874); Hartert, Cat. Birds B. M. xvi. p. 481 (1892); Salv. 4- 

 Godm. Biol. Centr.-Amer., Aves, ii. p. 375 (1894) ; Bendire, Life- 

 Hist. N. Amer. Birds, ii. p. 183, pi. i. fig. 26 (1895); Nehrk. Kat. 

 Eiersamml. p. 154 (1899) ; Sharpe, Hand-l. ii. p. 92 (1900). 



The eggs of Yaux's Swift in the Collection measure respectively : 

 •75 by "53 ; -77 by -53. 



2. North America. Crowley Bequest. 



