APPENDIX. 



885 



sex of C. virginianus texensis so closely as not to be distinguished with certainty. The species 

 is closely related to C. graysoni of Mexico, and may be found in fact to intergrade with the 

 latter. It inhabits southern Arizona and adjoining portions of Mexico, where it has long 

 been known to the natives, though only recently recognized by ornithologists. From the 

 first accounts which reached us, the bird was supposed to be C. graysoni, and it was entered 

 under this name in the A. O. U. List. It was first named C. ridgwayi by Brewster, The 

 Auk, April, 1885, p. 199. A monograph of the species and its allies, illustrated by a colored 

 plate, is given by Allen, Bull. Amer. Mus. Nat. Hist., July, 1886, pp. 273-290, pi. 23. 



COTJES KEY, 1884. 



574. Orortyx picta. 



000. [Not admitted in the Key.] 



575. Lophortyx californica. 

 000. [Not admitted in the Key.] 



576. Lophortyx gambeli. 



577. Callipepla squamata. 



UNION LIST, 1886. 



292. Oreortyx pictus. 



292a. pictus plumiferus. 



294. Callipepla californica. 



294a. californica vallicola. 



295. gambeli. 



293. squamata. 



293a. squamata castanogastris. 



677 his. Add : Callipepla squamata castaneiventris. Chestnut-bellifd Scaled 

 Partridge. Like the last, but the general coloring deeper and richer ; crown concolorous 

 with the back, and cheeks with the breast, both much darker than the throat; and belly 

 with a conspicuous central patch of uniform ^estnut. The ? lacks this patch, and is 

 much paler than the <Jf . While the true C squamata inhabits the Mexican table lands and 

 thence into Arizona, New Mexico, and western Texas, this form appears to characterize the 

 lower lands, extending into the lower Rio Grande valley. Bull. Nuttall Club, viii., Jan. 

 1883, p. 34. 



591 bis. Add : .ffigialites mongollcua. Mongolian Plover. Adult ,J 9 , in sum- 

 mer: Above, brownish-gray; below, white, with a broad cinnamon or chestnut pectoral bar, 

 extending more or less along the sides, encircling the neck behind, and somewhat tinging 

 the pileum. A long black subooular stripe, involving the lores and auriculars, reaching to 

 the bill, continuous in front of the eye with a black frontlet, in advance of which is a 

 white area divided by a narrow median line of black which connects the black frontlet with 



' A proper change, giving this species full rank, as distinguished from .<£. cantiamus, as suggested in the 

 Key, p. 604. 



