534 BIRDS OF BRITISH GUIANA. 



686, Tachyplionus luotuosus. 



Lesser White-shouldered Tanager. 



Tachyplionus luctuosiis Lafr. d'Orb. Syn. Av. p. 29, Mag. de Zool. 1837 

 "(Guarayos, Bolivia) ; Salvin, Ibis, 1885, p. 211 (Bai-tica Grove) ; 

 Sclater, Cat. B. Brit. Mus. xv. p. 208, 1886 (Bartica Grove); 

 Brabourne & Chubb, B. S. Amer. i. p. 421, no. 4.S34, 1912 ; Beebe, 

 Tropical Wild Life in British Guiana, p. 137, 1917 (Bai-tica). 



Adult male. General colour oE both the upper and under 

 snrEace glossy blue-hlack ; lesser upper wing-coverts white as are 

 also the axillaries, under wing-coverts, and inner edges o£ the 

 quills below ; inner webs o£ flight-quills above paler than the 

 outer webs, with white niai'gins towards the base; under surface 

 oE the quills blackish ; lower aspect of tail black. " Bill black, 

 plumbeous at base ; feet black" (Cat. B. Brit. Mus.). 



Total length 120 mm., exposed culnien 12, wing 60, tail 50, 

 tarsus 18. 



The male described was collected at Bartica, 1912. 

 Adult female. Crown of head, nape, and sides of face slate-grey ; 

 back, wings, and tail yellowish green ; inner webs of flight-quills 

 dark brOwn with pale inner edgings ; throat yellowish white ; 

 breast, abdomen, and under tail-coverts yellow ; sides of breast 

 and sides of body darker and more yellowish grey ; axillaries, 

 under wing-coverts, and inner edges of quills on the under 

 surface whitish ; remainder of quill-lining pale brown ; lower 

 aspect of tail yellowish brown. Wing 59 mm. 



The female described was collected at Kamakabra River in 

 19li. 



The young male in its first plumage is similar to that of the 

 adult female. An immature bird from the Makauria liiver, 

 which is in the transitional plumage, shows the bhick. feathers 

 of the adult male approaching on the head, back, wings, and 

 under surface. Tliere is also one from the Anarica River, 

 ^\hich show only slight remains of youth on the back and 

 abdomen. 



Breeding-seaso7i. Unknown in British Guiana. 

 Nest. Unrecorded in British Guiana. 

 Eggs, Undescribed from British Guiana. 



Range in British Guiana. Ituiibisi River, Supenaam Ri\er, 

 Bartica, Kamakabra River, Makauria River, Anarica River 

 {McConnell collection) ; Bartica {Whitelj/). 



