1H(\ BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



cc. Above chestnut-brown, dull russet or grayish russet. 



d. Larger (wing 93-106, tail 116-138); auricular region and sides nf neck <^n\y or 



grayish brown; under tail-coverts with distinct central markings df l)r(iwn 



or dusky. ( Toxostoma longirostre.) 



e. Smaller, with larger bill (adult male averaging, wing 97.4, tail llM.l, 



exposed culmen 29.4; adult female, wing 98, tail 129.7, exposed ciduKMi 



, 30); uj)per parts chestnut-brown. (States of Vera Cruz. Pucbla, Mexico, 



and Queretero, southeastern Mexico".) 



Toxostoma longirostre longirostre (p. 191) 

 ee. Larger, with smaller bill (adult male averaging, wing 99.5, tail 125.7, 

 exposed culmen 27.2; adult female, wing 98.9, tail 124.7, exposed 

 culmen 2().2j; upper parts grayish russet. (Southern Texas and north- 

 eastern Mexico.) Toxostoma longirostre sehnetti (p. 192) 



dd. Smaller (wing 88.5-94.5, tail 105-113.5); auricular region and sides of neck 

 rusty brown; under tail-coverts without brown or dusky central mark- 

 ings. (Otherwise like T. lonijirostre hmirirostre.) (Cozumel Island, 



Yucatan.) Toxostoma guttatum (p. 193) 



bb. Above grayish brown or Ijrownish gray. 



c. Tail 130-144; markings on lower parts large and roundish, even on Hanks. 

 (Southern Mexico, in States of Mexico, Puebla. and Oaxaca. ) 



Toxostoma ocellatum (p. 194 1 

 cc. Tail less than 130; markings on under ]>arts smaller, wedge-shaped or more 

 or less linear, 

 d. Markings on under parts distinctly darker than color of l)ack, at least on chest. 

 e. Triangular spots on chest, etc., black, l)lacki.'^h l)rown, or dusky. (Toxo- 

 stoma cinereum.) 

 f. Paler, with spots on under parts smaller; back, etc., hair ))rown. (Cape 



district of Lower California.) Toxostoma cinereum cinereum (p. 195) 



ff. Darker, with spots on underparts larger and Ijlacker; l)ack, etc., sepia 

 brown. (Western Lower California, in vicinity of San Quentin Bay.) 



Toxostoma cinereum mearnsi (p. 196) 

 ee. Triangular spots or streaks on chest, etc., grayi.sh brown, darker than 

 color of back, but not approaching dusky. (Deserts of Arizona, south- 

 eastern California, and Sonora.) Toxostoma bendirei (p. 197) 



dd. Markings on under parts not darker than color of back. [Toxostoma curvi- 



rostre.) 



c. liateral rectrices broadly and abruptly tipped with white. 



/. Smaller (adult male averaging wing 107.9, tail 109.5, exposed culmen 



29.5; adult female, wing 104.9, tail 104.3, exposed culmen 28.6); 



" upper parts grayer, under parts whiter. (Mexican plateau, except 



extreme nortliwestern portion, to southern Texas and N<'W Mexico.) 



Toxostoma curvirostre curvirostre (p. 199) 



ff. Larger (adult male averaging wing 112.1, tail 120.5 exposed culmen 



32.3; adult female, wing 110, tail 115, exposed culmen 31.5: upper 



parts browner, under parts more buffy. (Westen Mexico, in States 



of Sinaloa and Jalisco and Territory of Topic.) 



Toxostoma curvirostre occidentale i p. 201 ) 

 cc. Lateral rectrices not tipped with white." 



a A terminal spot is sometimes more or less distinctly indicated, but is either 

 very greatly restricted or without sharp definition, and pale grayish l)rown instead 

 of white. 



