1914 BIRDS OF ARIZONA 47 



200. Molothrus ater obscurus (Gmelin). 



Dwarf Cowbird. 



Synonyms — Molothrus pecoris; Molothms pecoris var. ohscitriis ; Molothrus 

 obscurus; Molothrus ater. 



Status — Found in the greatest abundance in the valleys of the Colorado and 

 Gila rivers, and their tributaries, and up into the foothills of the adjacent moun- 

 tains. Most abundant as a summer visitant, and reported from many localities, 

 north to the Mogollon Mountains (Mearns, 1890a, p. 257), Fort Whipple 

 (Coues, 1866a, p. 90), and Fort Mohave (Mus. Vert. ZooL). Remains through- 

 out the winter on the lower Colorado River. The only winter record I know of 

 outside of the Colorado Valley is of a single specimen taken by Bendire (1895, 

 p. 44) on Rillito Creek, near Tucson, January 24, 1873. 



201. Tangavius aeneus aeneus (Wagler). 



Bronzed Cowejrd. 



Synonym — Tangavius aeneus involucratus. 



Status — An occasional summer visitant in the hot valleys of extreme south- 

 ern Arizona. Seen in the vicinity of Tucson during the summer of 1909, from 

 April to September (Visher, 1909, p. 307; 1910, p. 210) ; and at Sacaton, also in 

 the summer of 1909 (Gilman, 1910, p. 46). 



202. Xanthocephalus xanthocephalus (Bonaparte). 



Yf;LLow-Hi;ADED Blackbird. 



Synonyms — Agelaius xanthocephahts ; Xanthocephalus icteroccphalus ; Xan- 

 thocephalus longipes. 



Status — Reported as breeding in the Mogollon Mountains (Mearns, 1890a, 

 p. 257) and at Fort Whipple (Coues, 1866a, p. 91). It winters commonly south 

 of the Gila River (Tucson, Fort Huachuca, etc.), and along the Colorado River 

 from Fort Mohave southward. 



203. Agelaius phoeniceus sonoriensis Ridgway. 



SoNORA Ri;d-winged Blackbird. 



Synonyms — Agelaius guberuator, part; Agelaius phoeniceus^ p^irt; Agelaius 

 phoeniceus longirostris. 



Status — A common resident in the valley of the Colorado River, at least. Its 

 manner of occurrence in other parts of Arizona has yet to be determined. 



204. Agelaius phoeniceus fortis Ridgway. 



Northern Red-v^inged Blackbird. 



Status — According to Ridgway (1902, p. 339) this subspecies occurs dur- 

 ing the migrations as far south as '^Arizona (Fort Verde, December, February; 

 Big Chino Valley, March).'' 



205. Agelaius phoeniceus neutralis Ridgwa)-. 



San Diego Red-winged Blackbird. 



Synonyms — ( ?) Agelaius phoeniceus, part; (f) Agelaius gubernator, part; 

 Agelaius phoeniceus sonoriensis^ part. 



