AMERICAN PARTRIDGES and QUAILS.
Distinguished from all the other subfamilies of Phasianidae by having the cutting edge of the lower mandible more or less distinctly serrated. Crested (except in Ortyx and Rhynchortyx). No spurs. Fourth quill longest (except in Dendrortyx). Tail of twelve feathers (except in Callipepla and Rhynchortyx). It includes the following genera:—
Dendrortyx. Three species of Long-tailed Partridges from Mexico and C. America. Males varying in length from 13 1/2" to 15".
Callipepla. Two species of Scaly Partridges with tail of fourteen feathers. One from New Mexico, called also the "Blue Quail" or the "White Top-knot Quail," and the other from Texas. 10".
Oreortyx. The Plumed Partridge or " Mountain Quail" from W. N. America. 9 1/2" long, Lophortyx. Pour species of Californian Quail from W. N. America and Mexico. Varying from 9" to 10" in length.
Philortyx. The Mexican Barred Partridge. 7 1/2" in length.
Eupsychortyx. Eight species of Crested Quails from C. and S. America. Varying from 8" to 9" in length.
Ortyx. Ten species of Colins or Bobwhites from U. S. America and Mexico. Varying from 7 1/2* to 9".
Cyrtonyx. Three species of Harlequin Quails from Mexico and C. America. With long claws, and varying from 7 3/4" to 8 1/3" in length.
Dactylortyx. The Long-nailed Partridge from C America. 9" in length.
Odontophorus. Fifteen species of Thick-billed Partridges from S. and C. America. Varying from 9 1/2" to 11 1/2" in length. Six of these species have the chest and breast spotted with white.
Rhynchortyx. Two species of Long-legged Colins. With tail of ten feathers. From C. America. 7 1/2" in length. (O.G. ii. 112-163.)