BIEDS OF NORTH AND MIDDLE AMEEICA. 527 



Eastern Mexico, in States of Nuevo Le6n, Tamaulipas (Victoria; 

 Rio de la Cruz; Santa Leonora), Vera Cruz (Mirad6r), and Yucatan 

 (M^rida, winter). 



AntrostomAis macromystax (not Caprimulgus macrotnystax Wagler) Baisd, Bebwee, 

 and RiDGWAT, Hist. N. Am. Birds, ii, 1874, 409 (Mirador, Vera Cruz). — 

 BoucABD, Proc. Zool. Soc. Lond., 1883, .451 (Merida, Yucatan). 



A[ntrostomits] macromyatax Ridgway, Man. N. Am. Birds, 1887, 298. 



[Antrostomus macromystax] var. macromystax Baied, Beewee, and Ridgway, 

 Hist. N. Am. Birds, ii, 1874, 409 (diagnosis). 



Caprimulgus salvini Haeteet, Ibis, sixth ser., iv, April, 1892, 287, in text (Mira- 

 dor, Vera Cruz; based explicity and exclusively on Antrosmus macromystax 

 Baird, Brewer, and Ridgway, Hist. N. Am. Birds, ii, 1874, 409); Cat. 

 Birds Brit. Mus., xvi, 1892, 568 (Nuevo Leon; Merida, Yucatan.) — Salvin 

 and GoDMAN, Biol. Centr.-Am., Aves, ii, 1894, 887, pi. 58& (Nuevo Leon; 

 Merida, Yucatan). 



Clapimulgus] salvini Habtbbt, Tierreich, Podarg., Caprim., Macropt., 1897, 43. 



[Caprimulgus] salvini Shaepe, Hand-list, ii, 1900, 85. 



A[ntrostomus\ salvini Ridgway, Man. N. Am. Birds, 2d ed., 1896, 298. 



Antrostomus notabilis Nelson," Proc. Biol. Soc. Wash., xviii, March 31, 1905, 111 

 (Victoria, Tamaulipas; coll. Am. Mua. Nat. Hist.). — Phillips, Auk, xxviii, 

 1911, 77 (Santa Leonora and Rio de la Cruz, Tamaulipas). 



ANTROSTOMUS NELSONI Ridgway. 



NELSON'S WHIPPOORWILL. 



Closely resembling A. salvini in size and general coloration, but 

 three lateral rectrices much more extensively tipped with white (the 

 white on outermost 58 mm. instead of only about 22 mm. long on 

 iimer web) and the white area longer on inner web than on outer, 

 instead of the reverse; scapulars and sides of pileum conspicuously 

 intermixed with pale gray; tawny-ochraceous collar across hindneck 

 broader, uninterrupted, very conspicuous; under tail-coverts immacu- 

 late. 



12 It is almost inconceivable that either Dr. Hartert or the authors of the "Biologia"' 

 could have confounded two such very different birds as the present species and the 

 one which I have named A. nelsoni (p. 527); furthermore, on reading carefully the 

 description of the specimen from Yucatan in the "Biologia" and examining with 

 equal care the colored plate in the same work (the latter being very inaccurate in some 

 respects for either species), I find nothing inconsistent with the characters of the 

 present bird; in fact one that is mentioned, the barred under tail-coverts, applies 

 only to A. salvini. Consequently I believe that Mr. Nelson erred in concluding that 

 the bird described and figured in the "Biologia" was different from the Vera Cruz, 

 Tamaulipas, and Nuevo Leon species. Whatever the bird from Yucatan may be, 

 however, has really nothing to do with the nomenclatural aspects of the case, since Dr. 

 Hartert based the name C. salvini explicitly and exclusively on the Antrostomus 

 maaomystax of Baird, Brewer, and Ridgway (in fact did not even mention any other 

 specimens), and hence the bird from Mirador, Vera Cruz, erroneously described as A. 

 macromystax is clearly the type of C salvini. Even if Dr. Hartert had subsequently 

 selected some other specimen as type, which I can find no evidence of hie having done, 

 he had no right, under the rules of nomenclature, to do so. 



