406 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Bill Williams R., and Ehrenberg, Arizona).— Osgood, Condor, v, 1903, 129 

 (Sulphur Spring, near Wilcox, Cochise Co., Arizona).— Swarth, Pacific Coast 

 Avifauna, no. 4, 1904, 5 (Huachuca Mts. and San Pedro R., Arizona) ; Condor, 

 vii, 1905, 25 (Papago Indian Reservation, Arizona; habits).— Miller (W. 

 De W.), Bull. Am. Mus. N. H., xxi, 1905, 343 (Escuinapa, Sonora).— Beebe, 

 Two Bird Lovers in Mexico, 1905, 185, 386 (Barranca Veltran, Jalisco).— Cole, 

 Bull. Mus. Comp. Zool., 1, 1906, 117 (Chichen-Itza and San Ignacio, Yuca- 

 tan).— Bailey (H. H.), Auk, xxiii, 1906, 385 (near San Bias, Tepic).— 

 Howell, Bull. Biol. Surv., no. 25, 1906, 22 (Texas; food).— Thayer and 

 Bangs, Proc. Biol. Soc. Wash., xix, 1906, 18 (Opodepe, Sonora).— Lamb, 

 Condor, xii, 1910, 76 (Las Marietas I., Mexico). 



C[olumbigallina] passerina pallescens Ridgway, Man. N. Am. Birds, 1887, 586; 

 2d ed., 1896, 591. 



Columbogallina passerina pallescens Lantz, Trans. Kansas Ac. Sci. for 1897-99 

 (1900), 219 (La Paz, Lower California). 



[Columbigallina passerina] var. pallescens Dubois, Synopsis Avium, ii, 1902, 763, 

 part. 



Columbigallina passerina pallascens Kaeding, Condor, vii, 1905, 111 (San Jose del 

 Cabo, Lower California). 



CHffiMEPELIA PASSERINA SOCORROENSIS (Ridgway.) 



SOCORRO GROUND DOVE. 



Similar to 0. p. passerina and O. p. neglecta, but wing shorter and 

 coloration decidedly darker and more brownish, especially the adult 

 female. 



Adult male.— Length, (skins), 147-164 (156); wing, 81-85 (83); tail, 

 52-58 (56); exposed culmen, 11-12 (11.5); tarsus, 15-16.5 (16).° 



Adult female.— Length (skins), 155-163 (159); wing, 81-84 (82); 

 tail, 53-59 (56); exposed culmen, 11-12 (11.5); tarsus, 16-17 (16.2).° 

 Socorro Island, Revillagigedo group, western Mexico; accidental or 

 casual on Ires Marias Islands (Maria Madre Island) 6 and on main- 

 land near Mazatlan, Sinaloa. 5 

 Chamsepelia pallescens (not C. passerina var. pallescens Baird) Lawrence, Proc. Bost. 



Soc. N. H., xiv, 1872, 275, part (Socorro I.).— Grayson, Proc. Bost. Soc. N. H., 



xiv, 1872, 300, part (Socorro I.). 

 Chsemepelia pallescens Lawrence, Mem. Bost. Soc. N. H.,ii, 1874, 305, part (Socorro I.). 

 C[olwmbigallina] passerina socotroensis Rldgway, Man. N. Am. Birds, Sept. 27, 1887, 



586 (Socorro Island, Revillagigedo group, w. Mexico; coll. U. S. Nat. Mus.); 2d 



ed., 1896, 591. 

 Columbigallina passerina socorroensis Rldgway, Man. N. Am. Birds, 1887, 592; 2d ed., 



1896, 614.— Townsend (C. H.), Proc. U. S. Nat. Mus., xiii, 1890, 135 (Socorro I.).— 



Anthony, Auk, xv, 1898, 316 (Socorro I.).— Kaeding, Condor, vii, 1905, 111 



(Socorro. I.) 

 [Chamsepelia] socorroensis Sharpe, Hand-list, i, 1899, 81. 

 Chamsepelia socorroensis Salvin and Godman, Biol. Centr.-Am., Aves, iii, 1902, 



252.— Lowe, Ibis, 1908, 112. 



a Ten specimens. 



5 It is quite possible that both these specimens are wrongly labeled as to locality, 

 and are in reality from Socorro Island. Grayson collected at all three places and may 

 have made an error in labeling. 



