8 



NORTH AMERICAN FAUNA 65 



(Storer, 1961), approximately 27 miles south of the capital, are im- 

 mature females taken November 1 and 24, 1946. They are probably 

 peninsulae , judging from their measurements. 



A juvenile male of peninsulae less than 5 weeks old was collected 

 at Santa Clara, Yucatan, September 2, 1950 (Yale U. No. 14384) . It 

 differs from juveniles of asiatica in having conspicuous buffy edging 

 on many of the lesser coverts. The color of the underparts is slightly 

 grayer, and the tips of the breast feathers are more tawny than in 

 asiatica. 



Additional proof that asiatica from the north occurs on the Pen- 

 insula in winter is found in two white-winged doves banded in Tamau- 

 lipas during the breeding season which were shot during winter in 

 Tabasco and Campeche, and two banded in southern Texas which 

 were recovered in Yucatan and Campeche. 



SPECIMENS EXAMINED 



Mexico: Yucatan: Izamal, Santa Clara, Chichen Itza, Sisal, San 

 Felif>e, and Xocempich. Some of those collected by Gaumer in Yucatan 

 were not marked as to sex, locality, and date. Campeche: Isla del Car- 

 men near Puerto Real, Jaina, Champoton, and 16 miles east of the 

 city of Campeche. Quintana Roo: Vigia Chico, Camp Mengel, Chet- 

 umal, and Isla Cozumel. 



Field investigations in the Big Bend sector of Texas and the review 

 of specimens collected there and elsewhere in the Southwest and in 

 Mexico proved that the white-winged dove of the Chinati Mountains 

 and the adjacent valley of the Rio Grande in the upper Big Bend 

 region of Texas is a distinct geographic race. As it is larger than the 

 other known North American species, it is named: 



Zenaida asiatica grandis^ new subspecies 

 Upper Big Bend White-winged Dove 



CHARACTERS 



It has longer wings, tail, and tarsus than mearnsi, monticola, and 

 asiatica, but its culmen is shorter than that of mearnsi. It is grayer 

 above and paler on the breast than asiatica, and slightly grayer t^ian 

 most mearnsi. The few specimens seen of monticola from the Chisos 

 Mountains and northern Mexico average very slightly browner on the 

 back than grandis, with the purple crown of the male slightly less 

 bright and more veiled with brown. The underparts are somewhat 

 paler in grandis than in asiatica. It is similar to Z. a. meloda of 

 South America in length of wing, tail, tarsus, and culmen, buit it is 

 much browner. The race meloda has a thicker bill, gray instead of 

 white tips to the rectrices, and other differences in color of plumage. 



