BIRDS OF NORTH AND MIDDLE AMERICA. 543 



Caprimulgus laticaudatus Drapiez, Diet. Class. Ilist. Nat., vi, 1824, 169 (see Cae- 



sin, Proc. Ac. Nat. Sci. Phila., 1851, 182). 

 N[yctidromus] albicollis (typicus) Hartert, Tierreich, Podarg., Caprim., 



Macropt., 1897, 32, part. 

 Nyctidromus albicollis merrilli (not of Sennett) Lantz, Trans. Kansas Ac. Sci. for 



1896-97 (1899), 220 (Naranjo and Santo Tomas, Guatemala). 

 (?) Nyctidromus albicollis gilvus Bangs, Proc. New Engl. Zool. Club, iii, March 



31, 1902, 82 (Santa Marta, Colombia; coll. E. A. and 0. Bangs).— Allen, 



Bull, Am. Mus. N. H., xvi, 1905, 281 (Bonda and Don Diego, Santa Marta'; 



descr. eggs). 



NYCTIDROMUS ALBICOLLIS YUCATANENSIS Nelson. 



YUCATAN CUlf JO. 



Similar to N. a. alhicollis but larger and paler; similar also to N. a. 

 merrilli but smaller and darker. (The grayish phase seems to largely 

 predominate in this form, only one specimen among the seventeen 

 examined being in the rufescent plumage.) 



Adult male.— Length (skins), 263-300 (283); wing, 163.5-175.5 

 (167.9); tail, 141-165 (156.7); exposed culmen, 12-14 (13.2); tarsus, 

 24-28 (25.9); middle toe, 19-23.5 (21.2).« 



Adult female. — Length (skins), 251-263 (256); wing, 157.5-170 

 (162.7); tail, 132-154 (141.8); exposed culmen, 12-13.5 (12.7); tar- 

 sus, 23.5-26.5 (24.7); middle toe, 20-22 (21).^ 



Eastern Tabasco (Montecristo), Campeche (Apazote), Yucatan 

 CMerida; Tunkas; C^tiichen-Itza ; Xbac; Shkolak; Ticdl; Temdx; 

 Peto; Buctzotz; Mugeres Island; Cozumel Island), and British 

 Honduras (forest near Manatee Lagoon, March, August; Toledo 

 District, January; Orange Walk ? ; Belize). 



Nyctidromus albicollis (not Caprimulgus albicollis Gmelin) Lawrence, Ann. Lye. 

 N. Y., ix, 1869, 204 (Merida, Yucatan). — Boucard, Proc. Zool. Soc. Loud., 

 1883, 45 (Yucatan). — Salvin, Ibis, 1889, 368 (Mugeres and Cozumel islands, 

 Yucatan).— Stone, Proc. Ac. Nat. Sci. Phila., 1890, 206 (Tunkas, Shkolak, 

 and Ticul, Yucatan). — Hartert, Cat. Birds Brit. Mus., xvi, 1892, 587, 

 part. — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1894, 393, part (Peto, 

 Buctzotz, Temax, Tunkas, Shkolak, Ticul, Merida, Mugeres I., and Cozumel 

 I., Yucatan; Orange Walk and Belize, Brit. Honduras?). 



Nyctidromus albicollis merrilli (not of Sennett) Chapman, Bull. Am. Mus. N. H., 

 viii, 1896, 285 (Cliichen-Itza, Yucatan; habits; notes). 



Nyctidromus albicollis yucatanensis Nelson, Proc. Biol. Soc. Wash., xiv, Septem- 

 ber 25, 1901, 171 (Tunkas, Yucatan; coll. U. S. Nat. Mus.).— Cole, Bull. 

 Mus. Comp., Zool., 1, 1906, 127 (Chichen-Itza). 



NYCTIDROMUS ALBICOLLIS SUMICHRASTI Ridgway. 



STTMICHRAST'S CUlfiJO. 



Similar in coloration to iV. a. alhicollis but much larger; interme- 

 diate in size between iV. a. merrilli and N. a. nelsoni but much darker 

 than either; larger and decidedly darker than N. a. yucatanensis. 



a Twelve specimens. ^ Six specimens. 



