/» CYPSELII).E. 



Two cg^s of the Siberian Spine-tailed Swift measure respectively : 

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



2. Sega, N. Mongolia (A. Rilckheil). Crowley Bec[uest. 



Chsetura zonaris (Shatv). 



Hemiprocne zonaris, Scl. ^- Salv. P, Z. S. 1879, p. 531 ; Scl. ^- Hvds. 



Aryent. Orn. ii. p. 11 (1889). 

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



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



Kat. Eiersarmnl. p. 154 (1899); Shat^je, H(md-l.ii. -^.^l (1900); 



von Iheriny, Rev. 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. Frontino, Antioquia, U.S. Colombia Salviu-Godman Coll. 



(r. K. Salmon). 



2. Colombia. Crowley Bequest. 



Chsetura pelagica (Linn.). 



Hirundo pelasgia, Thien. Fortpjianz. ges. Viig. tab. xlii. fig. 5 (1845-54). 

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



(1856). 

 Chfetura pelagica, Baird, Brewer Sc Ridgio. N. Amer. Birds, ii. p. 432 



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



Life-Hist. N. Amer. Birds, ii. p. 177, pi. i. fig. 25 (1895) : Nckrk. 



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 ia breadth. 



1. North America (Smiths, hist.). Salvln-Godman Coll. 



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

 {'). North America. Crowley Bequest. 



3. North America (Tm-ira??i Cci//.). Crowley Bequest. 



Chsetura vauxi (Towns.). 



Chretura vauxi, Baird, Brewer Sf Ridgio. N. Amer. Birds, ii. p. 4.35 

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

 Godm. Biol. Centr.-Amer., Ares, 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 Vaux's Swift in the Collection measure respectively : 

 •75 by '53 ; -77 by •b'i. 



2. North America. Crowley Bequest. 



