78 CTPSEUDJ!. 



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

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



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



Chsetura zonaris {^haw). 



Hemiprocne zonaris, Sol. Sr Salv. P. Z. S. 1879, p. 531 ; Scl. Sf Huds. 



Ai-gent. Orn. ii. p. 11 (1889); 

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



Sah. ^ Godm. Biol. Centr.-Amer., Aves, ii. p. 373 (1893) ; Nehrk. 



Kat. Eiersamml. p. 154 (1899) ; Sharpe, Hwnd-l. ii. p. 91 (1900) ; 



von Ihering, Rev. Mus. Pavlista, p. 255 (1900). 



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

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



1. Frontino, Antioquia, U.S. Colombia Salvin-Godman Coll. 



(r. K. Salmon). 



2. Colombia. Crowley Bequest. 



Chsetura pelagica (Linn.). 



Hirundo pelasgia, Thien. 'Fortpjlanz. ges. Vog. tab. xlii. flg. 6 (1846-54). 

 Acanthylis pelasgia, Brewer, N. Amer. Ool. pt. i. p. 108, pi. iv. fig. 51 



(1856). 

 Chsetura pelagica, Baird, Brewer Sr Ridqw. N. Amer. Birds, ii. p. 4.52 



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



LifeSist. N. Amer. Birds, ii. p. 177, pi. i. fig. 26 (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 'So in breadth. 



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



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

 (i. North America. Crowley Bequtest. 



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



Chsetura vanxi (Towns.). 



Chsetura vauxi, Baird, Brewer Sf Ridgw. N. Amer. Birds, ii. p. 435 

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

 Godm. Biol. Centr.-Amer., Aves, ii. p. 875 (1894) ; Bendire, Life- 

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

 Eiersamml p. 164 (1899) ; Sharpe, Handr-l. ii. p. 92 (1900). 



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

 •76 by -53 ; -77 by -53. 



2. North America. Crowley Bequest. 



