BIRDS OF NORTH AND MIDDLE AMERICA 343 



Adult female. — Wing 97.5-101.5 ; tail 53-54.5 ; culmen from base 14.4- 

 15.4; tarsus 25.1-28.2; middle toe without claw 24 mm. (2 specimens). 

 Range. — Known only from the type locality, Chicomuselo, Chiapas. 



Colinus virginianns insignis (not of Nelson) Hellmavr and Conover, Cat. Birds 



Amer., i, No. 1, 1942, 245, part (Chiapas, Chicomuselo). 

 Colijin.'; virgviiantis nclsoui Brodkorb, Occ. Pap. Mus. Zool. Univ. Michigan, No. 



467, 1042, 1 (Chicomuselo, Chiapas; spec; descr. ; crit. ; meas.). 



COLINUS VIRGINIANUS THAYERI Bangs and Peters 



Thayer's Bokwhite 



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

 the chin and throat, upper lores, forehead, and superciHaries white, the 

 throat sometimes streaked with black; above slightly paler and grayer, 

 less blotched and spotted. Similar also to the male of C. v. pecforalis but 

 with a broader black pectoral band, with less or no white at the base of 

 the feathers of this area.-'^ 



Adidt female. — Very similar to, not certainly distinguishable from, that 

 of C. V. coyolcos. In very fresh plumage thayeri seems to have more 

 grayish on the upper back and interscapulars, but after even slight wear 

 this distinction disappears. 



Other plumages apparently unknown. 



Adult male.— Wing 97-101 (99.9) ; tail 48^55.5 (52.6) ; culmen from 

 base 14.8-16.2 (15.3) ; tarsus 27.6-30 (28.7) ; middle toe without claw 

 24.8-26.6 (25.4 mm.). 28 



Adidt female.— Wing 98-102.5 (100.1) ; tail 50-54 (52) ; culmen from 

 base 14.5-16.2 (15.2) ; tarsus 26.9-29.6 (28.2) ; middle toe without claw 

 23.8-25.3 (24.7 mm.). 23 



Range. — Resident in the dry country of inland eastern Oaxaca from 

 Chivela to Guichicovi and Tutla. 



Type locality. — Chivela, Oaxaca. 



Colinus virginianus thayeri Bangs and Peters, Bull.. Mus. Comp. Zool, Ixviii, 1928, 

 386 (Chivela, Oaxaca, Mexico; spec; descr.; crit.).— Bangs, Bull. Mus. Comp. 

 Zool., Ixx, 1930, 160 (type spec, in Mus. Comp. Zool.).— Peters, Check-list 

 Birds of World, ii, 1934, 49 (known only from the type locality ).—Hellmayr 

 and Conover, Cat. Birds Amer., i, No. 1, 1942, 245 (syn. ; distr.; Oaxaca, Tutla, 

 and Guichicovi; spec). 



-' The status of thayeri and coyolcos is puzzling and cannot be settled with present 

 information. While the two groups are easily distinguished in the male plumage, 

 as noted in the description of coyolcos, two adult males from Huilotepec are more like 

 thayeri than like coyolcos, even though they come from the farthest side of the 

 range of the latter ! 



"'' Eight specimens. 



■^ Six specimens. 



