546 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Tres Marias Islands, western Mexico. 



Nyctvhomus albicoUis (not Caprimulgtis albicollis Gmelin) Grayson, Proc. Bost. 



Soc. N. H., xiv, 1871 (1872), 272 (Tres Marias Islands).— Lawkence, Mem. 



Bost. Soc. N. H., ii, 1874, 291, part (Tres Marias).— Hartbrt, Cat. Birds 



Brit. Mus., xvi, 1892, 587, part (Tres Marias).— Saivin and Godman, Biol. 



Centr.-Am., Aves, ii, 1894, 393, part (Tres Marias). 

 Nyctidromus albicollis insularis Nelson, Proc. Biol. Soc. Wash., xii, Jan. 27, 1898, 



9 (Maria Madre Island, Tres Marias group, w. Mexico; coll. U. S. Nat. Mus.); 



Norih Am. Fauna, no. 14, 1899, 44 (Tres Marias; habits). 

 [Nyctidr(ymiLs\ insularis Shakpb, Hand-list, ii, 1900, 83. 



NYCTIDROMUS ALBICOLLIS MERRILLI Sennett. 

 UEBBILL'S CTJl£jO. 



Similar in coloration to the grayish phase of N. a. nelsoni but much 

 larger; decidedly larger and darker than the grayish phase of N. a. 

 yibcatanensis; larger and paler than grayish phase of N. a. sumichrasti. 



AduU maZe.— Length (skins), 300-305 (303); wing, 173-187.5 

 (182.1); tail, 169-182.6 (176.6); exposed culmen, 11.5-12 (11.9); 

 tarsus, 27-28.5 (27.7); middle toe, 21.5-22.5 (22).« 



Adult female.— Length (skins), 264-290 (288); wing, 164.5-177.5 

 (170.1); tail, 147.5-156 (150.4); exposed culmen, 11.5-13.5 (12.6); 

 tarsus, 25-27 (25.6); middle toe, 20-21.5 (20.9).* 



Lower Rio Grande Valley and southern Gulf coast of Texas 

 (Hidalgo, Cameron, Nueces, San Patricio, Aransas, and Reftigio 

 counties), and southward into Tamaulipas (Soto la Marina; Alta 

 Mira; Tampico); in winter south to Vera Cruz (Mirad6r) and Puebla 

 (Metlaltoyuca; Tehuacdn?; Mazatiop&m?). 



Nyctidrmnus albicollis (not Caprimulgus albicollis Gmelin) Meekili; (J. C), Bull. 

 Nutt. Orn. Club, i, 1876, 88 (Ft. Brown, Texas, breeding); Proc. U. S. Nat. 

 Mus., 1, 1878, 145 (Ft. Brown and Hidalgo, Texas; habits; descr. nest and 

 eggs). — RiDGWAY, Proc. U. S. Nat. Mus., i, 1878, 143, part, pis. 1, 2 (generic 

 outlines; synonymy; description); iii, 1880, 188, 233; Nom. N. Am. Birds, 

 1881, no. 356.— Allen, Bull. Nutt. Om. Club, v, 1880, 90.— Ameeicau 

 Ornithologists' Union, Check List, 1886, no. 419. — ^Hancock, Bull. Bidgw. 

 Orn. Club, no. 2, 1887, 17 (Nueces B.., near Corpus Christi, Texas, 1 spec, 

 AprU 16). 



Nfyctidromus] albicollis Coues, Key N. Am. Birds, 2d ed., 1884, 450. — Ridgway, 

 Man. N. Am. Birds, 1887, 300. 



Nyctidromus aviericanus (not Caprimulgus americanus Linnaeus) Sennett, Bull. 

 U. S. Geol. and Geog. Surv. Terr., v, 1879, 409 (Lomita Ranch, Texas; habits; 

 descr. eggs). 



Nyctidromus albicollis merrilli Sennett, Auk, v, no. 1, Jan., 1888, 44 (Nueces R., 

 Nueces Co., Texas; coll. G. B. Sennett) .^American Ornhbioloqists' 

 Union, Suppl. to Check List, 1889, 22; Check List, 2d ed., 1895, no. 419; 3d 

 ed., 1910, 198.— Rhoads, Proc. Ac. Nat. Sci. Phila., 1892, 106 (Corpus Christi; 

 breeding).— Bendihe, Life Hist. N. Am. Birds, ii, 1895, 160, pi. 2, figs. 1, 2 

 (eggs).— Carroll, Auk, xvii, 1900, 344 (Refugio Co., Texas, breeding).— 

 Bailey (Florence M.), Handb. Birds W. U. S., 1902, 225. 



o Four specimens. 6 Nine specimens. 



