1914 BIRDS OF ARIZONA 59 



258. Pipilo maculatus curtatus Grinnell. 



NEVADA Tow HEX 



.Status Rather uncommon winter visitant along- the lower Colorado River; 

 specimens taken between Needles and Ehrenberg, in February and -March, 1910 

 (Mus. Vert. Zool.), and one at Fort Yuma January 23, 1913 (collection of A. B. 

 Howell). The capture of these specimens constitutes the only records I 

 know of regarding the occurrence of any form of Pipilo maculatus in the lower 

 Colorado Valley (see Grinnell, 1911, p. 309). 



259. Pipilo fuscus mesoleucus Baird. 



CANON TowiiEE. 



Synonym Pipilo mesoleucus. 



Status Common resident in the Upper Sonoran zone, and in Lower Sonoran 

 also in parts of southern Arizona. All of the published records are from points 

 south and east of the Mogollon divide ; but the species is absent from the exceed- 

 ingly arid southwestern corner of Arizona, and thus seems to occupy a belt ex- 

 tending across the state from Fort Mohave in the northwest (Fisher, i893b, p. 

 105), south to the extreme southeastern corner. Coues' ( i866c, p. 262) record of 

 the occurrence of the species on the lower Colorado River lacks confirmation. 

 Zonally it occupies an intermediate region between Pipilo m. uwntanns and P. 

 aberti, at places ascending or descending slightly into the habitats of those species. 

 In no one spot, however, are all three to be found. 



260. Pipilo aberti Baird. 



ABERT TOWHEE. 



Status Common resident of the valley of the Colorado River, and its tribu- 

 taries in western and southern Arizona. Abundant in the Lower Sonoran river 

 valleys of the south (Gila, Santa Cruz, San Pedro, etc.) extending as far north 

 as Fort Grant (Coues, 1868, p. 84) and Fort Whipple (Coale, 1894, p. 218). 

 Along the Colorado it has been found to the extreme northwestern corner of the 

 state: confluence of the Beaverdam and Virgin rivers (Fisher, 1893^ p. 105), 

 but no farther to the eastward. 



261. Oreospiza chlorura (Audubon). 



GREEN-TAILED TOWHEE. 



Synonyms Fringilla blandingiana; Zonotrichia blandingiana; Pipilo chlor- 

 ura; Atlapctcs chlorurus. 



Status A common migrant, occurring indifferently on Boreal mountain 

 tops or on the arid, semi-desert plains. Reported in winter from the Colorado 

 Valley (Cooper, 1870, p. 248), and as an occasional winter visitant in the Santa 

 Catalina Mountains in extreme southern Arizona (Scott, 1887, p. 204). Speci- 

 mens in the collection of F. S. Daggett taken at Fort Lowell in October, No- 

 vember, December and January. 



