63. Arboricola atrigularis.
THE BLACK-THROATED HILL-PARTRIDGE,
Peura, Sylhet; Duboy, Assam; Sanbatai, Ohittagong.
Male 10" to 11"; 7 to 10 oz. Female 7 to 10 oz. Legs orange-red. Bill black. Resembles A, torqueolus, but foreneck is black and flank-feathers are edged olive-brown with white spots near tips. Crown olive. Cheeks white. Back broadly barred and tipped black. Breast pale grey. Prom E. Assam to E. Bhamo. Four eggs (1.38 x 1.12), glossy white. (B. 1365. O. 30. O.G. i. 163. H. & M. ii. 79.)
Also A. ardeus. The Hainan H. P. Like A. atrigularis, but with orange-red chest-patch. 6 8".
A, crudigularis. The Formosan H.P. Like A. atrigularis, but with lower part of throat black. male 9 1/2". (O.G. i. 164.)
A. javanica. The Javan H. P. male 11". Crown red-brown. Above grey, barred black. Chest grey. Below chestnut.
A. rubirostris. The Red-billed H.P. from Sumatra. Above olive, barred black. Chest brown. Planks barred black and white. (O.G. i. 168.)