TACHYCINETA CYANEOVIRIDIS [Bryant). 



BAHAMA SWALLOW. 



Hirundo cyaneoviridis, Bryant, Proc. Bost. Soc. Nat. Hist. vii. p. Ill (1859) ; Baird. 



Review Amer. B. p. 303 (1865) ; Gray, Hand-l. B. i. p. 72, no. 850 (1869) ; 



Salvin, Ibis, 1874, p. 307 ; Cory, B. Baliama Isl. p. 79 (1880). 

 CulUchelidon cyaneoviridis, Baird, Beview Amer. B. p. 297 (1865); Cory, B. W. 



Indies, p. 73 (1889). 

 Sirundo {CalUcheUdon) cyaneoviridis, Baird, Brewer, & Ridgw. Hist. N. Amer. B. i. 



p. 327, note (1874). 

 Tachycineta cyaneoviridis, Sharpe, Cat. Birds in Brit. Mus. x. p. 121 (1885). 



T. uropygio dorso coiicolore : subtus albus : supracaudalibus chalybeis : dorso viridescente : cauda valde 

 furcata : uropygii lateribus miuime albis : macula alba supraoculari nulla. 



Hab. in insulis Baliamensibus. 



Adult male. General colour above oil-green with a steel-blue gloss, the latter more pronounced on the 

 lower rump and upper tail-coverts; wing-coverts blackish, externally steel-blue or bluish green, 

 the least series greener and more like the back ; bastard-wing, primary-coverts, and quills 

 blackish, externally glossed with steel-blue, the secondaries rather brighter steel-blue, and green 

 on their edges; tail much forked, the feathers black glossed with steel-blue; head and neck like 

 the back, as also the sides of the crown and upper margin of the ear-coverts; lores blackish, as 

 also the feathers immediately below the eye; cheeks, ear-coverts, and entire under surface of 

 body white, including the under wing-coverts and axillaries, sides of upper breast like the back ; 

 quills dusky below ; " bill and feet black " (C B. Cory). Total length 5'9 inches, culmcu U-3."j, 

 wing 4'6, tail 3, tarsus 0*45. 



Differs from T. thalassiaus in its strongly forked tail and larger size, in the absence of tlie 

 white spot above the eye, and in the totally different colour of the upper parts, in which tliiTc is 

 an absolute absence of any purplish shade. 



Young. Brown above with a strong lustre of oily green, a little more pronounced on the back ami wini^- 

 coverts ; head and upper tail-coverts more sooty brown, as also the upper margin of tin- car- 

 coverts ; cheeks, ear-coverts, and under surface of body wliitc, with a patch of sooty brown on 

 the sides of the upper breast. Total length 5-5 inches, culincn (J- 1, wing .'i-'J.'). tail 'J-'.', 

 tarsus 0" 15. 



Hob. Bahama Islands. 



This Swallow has as yet not been met with away from the Jialiama^. Its nearest ally 

 is '/'. Ihalassimis of North America, but it dilFers from tliat species in its larL,'er size ami 

 stronij'ly forked tail, in tlic absence of the white spot above the eye. and in Hn' I.ilallv 



