586 APPENDIX. 



bill, the latter often (always in fully adult males ?) red basally ; 

 wing 3.30-3.60 (3.46), exposed culmen .42-.47 (.44), tarsus .60-.66 

 (.62). Sab. Southwestern United States (Texas to Arizona and 

 Lower California), and south through Mexico (both coasts) to 

 Central America. 



— . C. passerina pallescens (Baird). Mexican Ground Dove. 1 

 (?. Back and rump deep olive-brown. 



Plumage in general much deeper than in true G passerina; wing 

 3.10-3.40 (3.28), exposed culmen .41-44 (.42), tarsus .60-.63 (.62). 

 Hab. Socorro Island, western Mexico ; Tres Marias ? 



C. passerina socorroensis Etdg w. Socorro Ground Dove. 3 

 b\ Smaller, with bill chiefly or entirely black or dusky (rarely yellowish or orange 

 at base). 



Similar in color of plumage to G. passerina pallescens, but still paler, with 

 upper parts more ashy ; wing 3.10-3.30 (3.21), exposed culmen .40-47 

 (.43), tarsus .60-.64 (.62). Sab. Bahamas ; Greater Antilles ? 



C. passerina bahamensis (Mats.). Bahaman Ground Dove. 



Genus MEGASCOPS Katjp, pages 260-262. 



In western Mexico (vicinity of Mazatlan), and possibly in Lower California, 

 occurs a species nearly allied to M. brasilianus (Gm.) of South America, but ap- 

 parently quite distinct. It belongs under section a 2 , having the toes completely 

 naked, but is very different from M. flammeolus in color and dimensions. It is an 

 undescribed species, which may be named Megascops hastatus and characterized as 

 follows : — 



Toes completely naked ; upper parts light grayish brown, mixed or mottled 

 with paler and spotted with blackish ; lower parts delicately but irregularly barred 

 with dark brown, on a whitish ground, and marked also with irregular mesial 

 streaks of brownish black, most conspicuous on chest ; legs whitish, barred with 

 dark brown; wing 6.00-6.10, tail 3.40-3.50. Sab. "Western Mexico (vicinity of 

 Mazatlan) ; La Paz, Lower California ? 



Genus ARA Beisson, page 268. 



Two species occur in southern Mexico, one of them common as far north as 

 Mazatlan. Their characters are as follows: — 



a 1 . General color grass-green, with forehead and part of tail-feathers red ; rump, 



tail-coverts, and tip of tail light blue ; wing about 14.00, tail about 15.00. 



Sab. Mexico to Bolivia. 



A. militaris (Linn.). Military Macaw. 4 



1 Ghamiepelia passerina var. pallescens Baird, Pr. Phil. Ac. 1859, 305. 



2 New subspecies; type, No. 50829, U. S. Nat. Mus., Socorro ; A. J. Grayaon. 



3 Ghamiepelia bahamensis Mayn., Am. Exchange and Mart, iii. No. 6, Feb. 5, 1887, 69. 

 *Psittacus militaris Linn., S. N. ed. 12, i. 1766, 159. Ara militaris Gray, Gen. B. ii. 1845, 412. 



