PROGNE. 



331 



Extralimital Range. Brazil, Venezuela, Cuba, Central and 

 North America. 



Habits. Schomburgk states (Reis. Guian. iii. p. 671) that this 

 bird is distributed all along the coast and is a common species in 

 the Colony, but he did not find its nest. 



558. Progne chalybea. 



Geey-bbkasted Martin. 



Sinrndo chalyhea Gmel. Syst. Nat. i. p. 1026, 1789 (Cayenne). 



Progne chalyhea Salvin, Ibis, 1885, p. 205 (Bartica Grove); Sharpe, 

 Cat. B. Brit. Mus. x. pp. 178, 633, 1885 (Bartica Grove) ; Quelch, 

 Timehri (2) v. p. 76, 1891 (Georgetown) ;, Brabourne & Chubb, 

 B. S. Amer. i. p. 327, no. 3385, 1912 ; Beebe, Trop. Wild Life 

 in Brit. Guian. p. 328, 1917. 



Progne chalyhea chalyhea Beebe, Our Search for a Wilderness, pp. 112, 

 244-247, 379, 1910 (Georgetown, Aremu Eiver, Abary Savannas). 



Adult male. Head, back, upper tail-coverts, upper -wing- 

 coverts, scapulars, sides of face, sides of neck, and sides of the 

 breast glossy-purple, like the lower flanks ; a more or less concealed 

 white patch on the sides of the lower back ; outer aspect of flight- 

 quills and tail-feathers steel-blue ; inner margins of flight-quills, 

 on the basal portion, pale brown; lores velvety -black ; throat and 

 breast dusky-brown, the feathers minutely edged with white ; 

 abdomen greyish white with dark shaft-lines to the feathers, 

 becoming uniform white on the vent and under tail-coverts; 

 axillaries and under wing-coverts blackish ; under surface of 

 flight-qiiiils and lower aspect of tail dark brown. 



Total length 179 mm., exposed culmen 11, wing 130, tail 63, 

 tarsus 16. 



The male described was collected on the Mazaruni River in 

 1905. 



Adult female. Upper surface similar to that of the adult male, 

 but not nearly so bright; lores, sides of face, sides of neck, and 

 sides of breast soot-brown ; paler on the throat and middle of the 

 breast, becoming white on the abdomen and under tail-coverts, 

 both of which have dark shaft-lines to the feathers ; axillaries 

 and under wing-coverts dark brown with white edgings to the 

 feathers j under surface of flight-quills and lower aspect of tail 

 brown, a slight mark of whitish on the inner webs of the outer 

 tail-feathers near the tips. Wing 127 mm. 



