BIRDS OF NORTH AND MIDDLE AMERICA. 



337 



[J r/('la:i(K} pJueniceus ScLATER and Saiai^, Nom. Av. Neotr., 1873, 37, part, 

 Agclali's plueniceus brynntl (not of Ridgway) American Ornithologists' Union 



Committee, Check List, 2d ed., 1895, no. 4986, part (Yucatan; Nicaragua). — 



Bendire, Life Hist. N. Am. Birds, ii, 1895, 453, part (Yucatan; Nicaragua). 

 Agcktius j)hceniceu.^ sonor'iensis (not of Ridgway) Bendire, Life Hist. N. Am. 



Birds, ii, 1895, 453, part (lower Rio Grande Valley). 

 Af/claius 2ih<jeniceus richmondi Nelson, Auk, xiv, Jan. 1897, 58 (Tlalcotalpam,Vera 



Cruz, s. e. Mexico; coll. U. S. Nat. Mus. ). — Ridgway, Proc. Wash. Ac. Sci., 



iii, 1901, 154 (geog. range). 



AGELAIUS PHCENICEUS SONORIENSIS Ridgway. 

 SONORAN RED-WING. 



Similar in coloration to A. j). richmondi., l)ut much larger. 



Adult male.—ljQngih (skins). 207-237.5 (221); wing, 121.9-129.3 

 (125.5); tail, 85.9-101.1 (93.5); culmen, from base, 22.6-25.4 (23.9); 

 depth of bill at base, 11.4-13.2 (12.4); tarsus, 29-31.8 (30.5); middle 

 toe, 21.1-22.9 (21.8).^ 



Adult female.— IjQXigih. (skins), 172.7-199.7(183.0); wing, 98.6-105.4 

 (98.8); culmen, from base, 17.8-21.3 (19.8); depth of bill at base, 9.4- 

 10.9 (9.9); tarsus, 25.4-27.9 (26.7); middle toe, 17.8-20.3 (19.1).' 



Lower Colorado Valle}", in California and Arizona, southern Ari- 

 zona in general, and southward over the coast plain of Sonora and 

 Sinaloa to Territory of Tepic;' Cape St. Lucas, Lower California?.* 



' Thirteen specimens. 



''■ Twenty-four specimens. 



•''Specimens from Tepic are larger than those from Sinaloa, and may not really 

 be referable to this form, the matter being rendered tlie more doubtful because 

 all the Tepic examples are males. Possibly the thick-billed large subarctic form 

 {A. p. fortls) may extend farther southward upon the high mountain meadows than 

 it has yet been traced, even to that portion of the Sierra Madre immediately north 

 of the Valley of the Rio Grande de Santiago, and there intergrade with the coast 

 form {A. J)- sonorie7is)s) . Should this hypothesis prove correct, then these large Tepic 

 specimens would be intergrades. Some of these Tepic specimens are large enough to 

 be referable to A. p. fortis, but their bills are too long, and on the whole they come 

 decidedly nearer to A. p. sonoriensis. 



Comparative average measurements of the two series and of -1 . p.fortlx are as follows: 



*The only specimen from the Cape district of Lower California that I have seen is 

 a female, and seems to be referable to this form. It is without date, and in rather 

 poor condition. 



3654— VOL 2-01 22 



