COLUMBA. 5l 
Family COLUMBIDZ. 
Tarsus slender, feathered at base; bill slender, gape small, and nostril 
covering conspicuously swollen; tail nearly square or greatly graduated ; 
colors blackish or reddish brown. 
Subfamilies. 
a, Tail moderate, nearly square; plumage mostly blackish with purple and green 
Me taMCwTEHSCOIONG es eee cetc eek ene te eee te Columbine (p. 51) 
a’. Tail greatly elongated and graduated; pinanaee mostly chestnut or rufous- 
brown wathe little metallic colors: eee ee Macropygine (p. 52) 
Subfamily COLUMBIN 4. 
Genus COLUMBA Linneus, 1758. 
Bill comparatively slender; membrane behind nostril greatly swollen 
and bulging out on the side; first primary very slightly scooped on inner 
web; tarsus feathered at the base. The only Philippine species is almost 
entirely black, glossed with green and purple. 
43. COLUMBA GRISEOGULARIS (Walden and Layard). 
GRAY-THROATED PIGEON, 
Tanthoenas griseogularis WALDEN and Layarp, Ibis (1872), 104, pl. 6. 
Columba griseigularis SALyaporI, Cat. Birds Brit. Mus. (1893), 21, 313; 
SHARPE, Hand-List (1899), 1, 72; McGrecor and WorceEsTER, Hand- 
List (1906), 13. 
Ba-lud mai-tim, Manila; bd-duc, Batan. 
Basilan (Hverett, Bourns & Worcester); Batan (McGregor); Cagayan Sulu 
(McGregor); Calayan (McGregor); Guimaras (Layard, Meyer); Lubang 
(McGregor) ; Luzon (Gevers, Whitehead) ; Mindanao (Steere Exp., Platen, Good- 
fellow) ; Mindoro (McGregor); Negros (Everett, Whitehead); Romblon (Mec- 
Gregor) ; Sibutu (Everett) ; Sibuyan (McGregor) ; Sulu (Burbidge) ; West Bolod 
(Mearns). Northern Borneo. 
Adult (sexes alike).—General color slate-black with metallic purple 
or green tips to the feathers; chin, upper throat, and sides of face below 
eyes pale gray; head, neck, back, breast, abdomen, and tips of wing- 
coverts, and upper and under tail-coverts glossed with metallic purple 
changing to green; remiges and rectrices black without metallic reflec- 
tions, their coverts largely black with only the tips metallic; colors 
change greatly with the angle at which the specimen is held. Iris 
bright yellow; base of bill dark red, tip light yellow; feet and bare space 
about eye red. Length, 380 to 430; two males, wing, 248; tail, 161; 
exposed culmen, 22; tarsus, 28. 
Young.—Differs from the adult in having metallic edges of feathers 
narrower on body, and wanting on wing-coverts: throat and_ breast 
blackish brown, each feather tipped with cinnamon. 
