534 BIRDS OF BRITISH GUIANA. 



G86. Tachyplionus luctuosus. 



Lesser White-shouldered Tanager. 



Tacln/plionus hicfuosus Lafr. d'Orb. Syn. Av. p. 20, Mag. de ZooL 1837 

 (Guai-ayos, Bolivia); Salvin, Ibis, 1885, p. 211 (Bartica Grove); 

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

 Bmbourne k Clnibb, B. S. Anier. i. p. 4-21, no. 4334, 1912 ; Beebe, 

 Tropical Wild Life in British Guiana, p. 137, 1917 (Bartica). 



Adult male. General colour of both the upper and under 

 surface glossy hlue-hlaok ; lesser upper wing-coverts Avhite as are 

 also the axillaries, under wing-coverts, and inner edges of the 

 quills below ; inner webs of flight-quills above paler than the 

 outer websj with white margins towards the base ; under surface 

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

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



Total length 120 mm., exposed culmen 12, wing GO,' 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 fiight-quills 

 dai'k brown with pale inner edgings ; throat yellowish white ; 

 breast, abdomen, and under tail-coverts yelloAV ; 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 

 1911. 



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

 adult female. An immature bird from the Makauria Biver, 

 Avhich is in the transitional plumage, shows the black feathers 

 of the adult male ap[)roaching on the head, back, wings, and 

 under surface. Th.ere is also one from the Anarica lliver, 

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

 abdomen. 



Breeding-season. Unknown in British Guiana. 

 Nest. Unrecorded in British Guiana. 

 Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi lliver, Supenaam Tiiver, 

 Bartica, Kamakabra Biver, Makauria River, Anarica liiver 

 (McCo7ineU collection) ; Bartica {Whitehj). 



