The same as Francolinus, but tail is of twelve feathers. First primary is equal to the tenth (sixth longest). Bill stout, long, and curved. Pair of spurs in both sexes. Sexes quite different.
R. longirostris. The Long-billed F. from Malay Peninsula to Borneo. male 14 1/2". Crown rich brown. Above chestnut, blotched black. Neck, chest, and upper mantle grey. Below rufous. Female neck and breast chestnut.
E. dulitensis. Hose's L. B .F. from Borneo. Chest and breast grey. Below white. (O.G. i. 112-142.)