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[olumbigaUina] 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). 



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

 part. 



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

 Cabo, Lower California). 



CH^MEPELIA PASSERINA SOCORROENSIS (Ridgway.) 



SOCORRO GROUND DOVE. 



Similar to C. p. passerina and C. 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 Tres Marias Islands (Maria Madre Island)^ and on main- 

 land near Mazatlan, Sinaloa.^ 

 Chamxpelia 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.). 

 Chaemepelia pallescens'LAWRENCE, Mem. Bost. Soc. N. H.,ii, 1874, 305, part (Socorro I.). 

 C[olumbigallina] passerina socorroensis Redgway, Man. N. Am. Birds, Sept. 27, 1887, 



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



ed., 1896, 591. 

 Columhigallina passerina socorroensis Ridgway, 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. 

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



252.— Lowe, Ibis, 1908, 112. 



o Ten specimens. 



^ It is quite possible that both these specimens are wrongly laljeled as to locality, 

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

 have made an error in labeling. 



