112 Nelson New Species of Whip-poor-will from Mexico. 



slightly larger spots on same webs ; rictal bristles large and coarse as in A. 

 macromystax; chin and throat dusky, finely barred with cinnamon buff and 

 bordered below by a buffy white collar ; rest of underparts dusky thickly 

 mottled and spotted with reddish brown, gray, and white, the spotting 

 more denned and darker on breast and paler and more diffuse on abdomen ; 

 under tail coverts deep dull buff coarsely barred with dusky ; underside of 

 outer tail feather irregularly barred with deep buffy mottling and tipped 

 with a narrow diagonal band of white (occupying less than ^ its length) ; 

 this terminal band with its highest point on outer border of outer web; 

 second feather with similar white band ; third feather with a very narrow 

 buffy band mainly on tip of outer web. 



Female. Generally similar to male but outer tail feathers tipped with 

 narrower bands of dull buff and underside of tail coverts more strongly 

 banded with buffy mottling. 



Measurements of type. Wing, 175 mm. ; tail, 127 ; culmen, 14 ; tarsus, 19. 



Measurements of female from type locality. Wing, 173; tail, 122; culmen, 

 13.5 ; tarsus, 18. 



Measurements of a,n adult male Antrostomus salvini, No. 40,093, Museum 

 Comparative Zoology, taken at Chichenitza, Yucatan, March 19, 1904, by 

 L. J. Cole. Wing, 176; tail, 130; culmen, 14; tarsus, 18. 



Specimens examined. Five, as follows : Victoria, Tamaulipas, 3 ; Mira- 

 dor, Vera Cruz, 2. 



Distribution. Eastern Mexico along basal slopes of the Cordillera from 

 Victoria, Tamaulipas, south at least to Miradar, Vera Cruz (500 to 3,000 ft. 

 altitude). 



Remarks. In general color this species is much like A. macromystax 

 from which its larger size and peculiarly marked tail render it easily sep 

 arable. In size it closely approaches A. salvini but the tail markings are 

 strikingly different. The type of A. salvini came from Yucatan and is 

 described and figured in the Biologia Centrali-Americana, Aves, II, p. 387, 

 pi. 586. Both Hartert and the authors of the Biologia have referred the 

 Antrostomvs macromystax of Baird, Brewer, and Ridgway, Birds of North 

 America, II, p. 409, to A. salvini. That this is an error is shown by exam 

 ination of the specimens from Mirador, described in the work cited, which 

 are perfectly typical examples of A. notabilis with the distinctive narrow 

 white tips to the tail feathers. As the white on the tail of A. notabilis is 

 like that on Nyctagreus yucatanicus the marked difference in this character 

 between it and salvini can be seen by a glance at plates 58a and 586 in 

 vol. II of the Biologia. 



