A Manual of Philippine Birds - Richard C. McGregor

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.