104 BULLETIN 86, UNITED STATES NATIONAL MUSEUM. 



Male:^ Wing, 173-192 (average, 183.4) mm.; tail, 104-119 (111.6) ; 

 exposed culmen, 5.0-6.8 (5.9) ; tarsus, 13-15 (14) ; middle toe, 13-15 

 (14.2). 



Female :i Wing, 168.5-180 (175) mm.; tail, 102-110 (106.1); ex- 

 posed culmen, 5.1-7.0; (6,0); tarsus, 12.5-15.2 (13.5); middle toe, 

 13-15.8 (14.2). 



Type-locality. — Ringgold Barracks,^ near Rio Grande City, Texas. 



Geographical distribution. — ^The southwestern United States, 

 Mexico, and all of Central America. Breeds in the Lower Austral, 

 Upper Austral, and Upper Tropical zones of the southwestern 

 United States, northern and central Mexico (excepting southern 

 Lower California) : north to Kerrville and Pecos City, middle Texas; 

 Alamagordo, Deming, and Lone Mountain (Grant County), southern 

 New Mexico ; the Santa Catalina Mountains, southeastern Arizona ; 

 Fort Verde, central Arizona ; Beaverdam, northwestern Arizona ; 

 St. George, southwestern Utah; Virgin Valley, Vegas Valley, and 

 Ash Meadows, southern Nevada; Bishop (Owens Valley), Chinese 

 Camp (Tuolumne County), Marys^dlle, Winslow (Glenn County), 

 and Ukiah (Mendocino County) , central California ; west to Ukiah, 

 Paicines (San Benito County), Ventura, San Pedro, San Diego, 

 and 6 miles west of Mountain Spring, western California ; Colorado 

 River opposite the mouth of Hardy River, northwestern Sonora; 

 Rancho Baillon, Papasquiaro, and Durango, western Durango; Ro- 

 sario, southern Sinaloa; Chicalote, central Aguas Calientes; and 

 Guanajuato, Guanajuato; south to Chimalpa (Valley of Mexico), 

 Mexico; Puente de Ixtla, southern Morelos; and San Baltazar, 

 Puebla; east to Jalapa, central western Vera Cruz; Alta Mira and 

 Matamoros, eastern Tamaulipas; Brownsville, Corpus Christi, and 

 Port O'Connor, central southern Texas. Winters regularly in cen- 

 tral and southern Mexico, and in all of Central America: north to 

 Chacala, Durango, rarely to Phoenix, Arizona ; ^ west to Manzanillo, 

 Colima; east to Orizaba, Vera Cruz, and Cozumel Island, Yucatan, 

 in Mexico; and southeast through Guatemala, Honduras, Salvador, 

 Nicaragua, Costa Rica, and Panama, to Cana, eastern Panama. 



Remarlcs. — The present race differs from Chordeiles acutipennis 

 micromeris in considerably larger size, broader light tail-bars, and 

 rather paler, rather more brownish tone of the upper surface. It 

 is much larger than Chordeiles acutipennis acutipennis^ with broader 

 light tail-bars, and is paler, more grayish, both above and below. 

 The Juvenal plumage is identical with that of Chordeiles acutipennis 

 inferior hereinafter described.* 



^ Fifteen specimens, from Texas, Arizona, and California. 

 2 Here for the first time definitely restricted to this locality. 

 « Taken, December Q.1, 1897. 

 * Sec p. 110. 



