"The blue spot on the nape on which Meyer relies to separate the Basilan birds is a minus quantity in our five specimens from that island, though they are in breeding plumage. This species is quite common in Sulu and Tawi Tawi, and is sometimes found feeding in isolated trees in open fields. "Iris yellow; legs dark pink; feet same color; nails nearly black; bill and eye-wattle light greenish yellow. Length, 230; wing, 121; tail, 81; culmen, 33; middle toe with claw, 29." (Bourns and Worcester MS.) Subfamily MUSCADIVORINÆ. This group includes the largest species of forest pigeons. Genera. a1. Colors above, except head, metallic blue, green, purple, or bronze; or the tail at least metallic green above. b1. First primary not scooped on inner web; lower parts uniform in color. ... Muscadivores (p. 42) b2. First primary deeply scooped on inner web. c1. No light band on tail. ... Ptilocolpa (p. 45) c2. Tail crossed by a conspicuous gray band. ... Zonophaps (p. 48) a2. Colors cream and slate; no metallic colors on any part of plumage. ... Myristicivora (p. 50) Genus MUSCADIVORES Gray, 1855. Inner web of first primary very slightly attenuated; gape deeply cleft; tarsus stout and feathered in front for half its length. Upper parts, except head and neck, metallic blue or green; tail nearly uniform with the back and wings, without a light band; head and lower parts pearl-gray or pale vinaceous-gray. Species. a1. Larger; back and scapulars glossy green or coppery bronze. b1. Nape with a coppery chestnut patch. ... nuchalis (p. 43) b2. Nape without a coppery chestnut patch. c1. Gray of mantle lighter and more sharply defined from the green back. d1. Upper surface of tail lighter and greener. ... chalybura (p. 43) d2. Upper surface of tail darker and bluer. ... palawanensis (p. 44) c2. Gray of mantle darker and less sharply defined. ... ænea (p. 44) a2. Smaller; back and scapulars glossy brown with but little metallic color. b1. Under parts lighter. ... pickeringi (p. 44) b2. Under parts darker. ... langhornei (p. 45) 31. MUSCADIVORES NUCHALIS (Cabanis). CHESTNUT-NAPED IMPERIAL PIGEON. Carpophaga nuchalis Cabanis, Jour. für Orn. (1882), 126; Salvadori, Cat. Birds Brit. Mus. (1893), 21, 190; Grant, Ibis (1895), 116; Whitehead, Ibis (1899), 487; Sharpe, Hand-List (1899), 1, 64. Muscadivora nuchalis McGregor and Worcester, Hand-List (1906), 11. Calayan (McGregor); Camiguin N. (McGregor); Fuga (Whitehead); Luzon (Whitehead); Mindoro (teste Hartert). This species has been established on the character of a cupreous chestnut nape; otherwise it differs but slightly from M. chalybura with which it appears to intergrade. Its status is somewhat doubtful. 32. MUSCADIVORES CHALYBURA (Bonaparte). BONAPARTE'S IMPERIAL PIGEON.