PTILOCOLPA. 47 
Young.—Immature birds have the fore breast chestnut, uniform with 
the abdomen, thus not resembling the adult plumage of either sex; wings 
rich metallic green, or copper-red, without canescence and the primaries 
neither scooped nor cut as are those of the adult. 
The plumage of the male and female in the gray-breasted fruit pigeon 
is so different that the sexes were long considered to represent distinct 
species. Grant, working on the material gathered by Whitehead, has 
shown that these differences are sexual and not specific and more recently 
collected material sustains his conclusions. 
In habits these birds are quite similar to the slightly larger imperial 
pigeons or baluds. They feed on large seeds or nuts and are often found 
in considerable numbers in fruiting trees. 
38. PTILOCOLPA NIGRORUM Whitehead. 
BLACK-BREASTED FRUIT PIGEON. 
Ptilocolpa nigrorum WHITEHEAD, Bull. Brit. Orn. Club. (1897), 6, 34; Ibis 
(1899), 490; McGrrcor and WorcrstTER, Hand-List (1906), 12. 
Negros (Whitehead). 
Adult male.—Similar to P. carola but band on fore breast black not 
ash-gray. Total length, 330; wing, 211; tail, 122; tarsus, 22.* “Base 
of bill coral-pink, tipped with dull white; iris pale straw-yellow; feet 
coral-pink.” (Whitehead.) 
Adult female.—Said to be similar to the female of griseipectus. 
This species is known from Whitehead’s specimens only, taken “when 
camped just below the bare cone of Canloon.” 
39. PTILOCOLPA MINDANENSIS Grant. 
MINDANAO FRUIT PIGEON. 
Ptilocolpa mindanensis GRANT, Bull. Brit. Orn. Club. (1905), 16, 16; Ibis 
(1906), 503. 
Mindanao (Goodfellow, Celestino). 
Adult male-—“Very similar to the male of P. nigrorum Whitehead, 
but with the chin, throat, and upper part of the chest nearly pure white, 
instead of gray, and the breast deep grayish black. ‘Iris creamy white; 
eyelids pale gray; bill scarlet at base, pinkish white toward the tip; 
feet dull purple.’ (Goodfellow.) Length, about 330; wing, 205; tail, 
114.” (Grant.) 
Collected on Mount Apo, Mindanao, at 2,440 meters. . 
* Whitehead’s diagnosis is as follows: “Similis P. griseipectori (Bp.), sed plaga 
prepectorali nigra, nee cinerea, facile distinguenda. Long. tot. 13.0 poll., ale 
$.3, caude 4.8, tarsi 0.85.” 
