342 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Adult female.— W'mg 93-96.5 (94.3) ; tail 45.5-49 (46.8) ; culmen from 

 base 14.5-15.5 (15.0) ;■ tarsus 26.5-27.3 (26.9) ; middle toe without claw 

 23.3-24.4 (23.3 mm.).-« 



Range. — Resident in the coastal plains of southern Chiapas, Mexico, 

 near the Guatemalan border (Tapachula, San Benito) from sea level to 

 500 feet. 



Type locality. — Tapachula, Chiapas. 



Colinus salvini Nelson, Auk, xiv, 1897, 45 (Tapachula, Chiapas, s. Mexico; coll. 

 U. S. Nat. Mus.); xv, 1898, 122 (s. Chiapas, Pacific coast to 500 feet).— 

 Ogilvie-Grant, Ibis, 1902, 241 (crit. ; spec; San Benito, Chiapas; plum.). 



[Colinus] salvini Sharpe, Hand-list, i, 1899, 46. 



Ortyx salvini Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1903, 304 (Tapa- 

 chula and San Benito, Chiapas). 



Colinus virginianus salvini Peters, Check-list Birds World, ii, 1934, 48 (coast plains 

 of southern Chiapas near the Guatemalan border). — Hellmayk and Conover, 

 Cat. Birds Amer., i, No. 1, 1942, 246 (syn.; distr.). 



[Colinus] V [irginianus] salvini Brodkorb, Occ. Pap. Mus. Zool. Univ. Michigan, No. 

 467, 1942, 1, in text, 4, in key. 



COLINUS VIRGINIANUS NELSONI Brodkorb 



Nelson's Bobwhite 



Adult male. — Similar to that of Colinus virginianus salvini but with 

 the dark markings even darker, purer black, instead of brownish black, 

 although less extensive; the while markings also purer, less grayish, and 

 smaller in extent ; rufescent markings brighter and more extensive ; the 

 black of the chin and throat not extending over the breast, except as a few 

 of the pectoral feathers have blackish margins ; some of the abdominal 

 feathers, especially the midventral ones, may also have narrow blackish 

 margins; thighs, vent, and under tail coverts almost pure bright hazel 

 with no or few blackish markings. From C. v. coyolcos it differs in hav- 

 ing more extensive and deeper black markings, deeper hazel markings, 

 and purer (less huffy) white markings, all of which are more in conlrast 

 with each other; no white superciliaries ; the crown is entirely black in 

 two males, but has a brown patch on the occiput and nape in one example. 



Adult female. — Like that of C. v. salvini but with the black markings 

 smaller and the brown and buff markings more extensive. All the colors 

 are brighter, clearer, more sharply contrasted. From C. v. coyolcos it 

 differs in being darker and in having all the markings more sharply 

 contrasted. 



Other plumages apparently unknown. 



Adult male.—W'mg 102.5-103 ; tail 56-57; culmen from base 14.9-15.1 ; 

 tarsus 27.5-28.6; middle toe without claw 23.6-24.7 mm. (2 specimens). 



'" Three specimens. 



