88 PROCEEDINGS OF THE ACADEMY OF 



outer web of the external tail feather, and, to a less degree, the edge of the 

 inner web of the same, are quite purely white. The bill is dusky brown 

 above, dusky flesh color below, the feet black. The unusual length of the 

 tail also attracted my attention. 



A fully adult male, procured April 20, has the black face and chin exactly 

 as in atrigularis. The interscapulars are of a brighter chestnut than in the 

 fall bird. The slate gray of the head and breast is deeper and purer, and 

 more markedly contrasted with the also purer white of the middle abdominal: 

 region. 



An adult female in deep moult, procured July 21, has also no trace of black 

 about the head. 



Several specimens from Cape St. Lucas, in precisely the plumage of my 

 autumnal Whipple examples, I find labelled by Baird with the MSS. name 

 " S. cana, n. s." 



It is just possible that large series may hereafter establish a species from 

 Arizona and California distinct from the Mexican, both possessing the' black 

 on the face ; but at present I cannot satisfactorily distinguish two species. 

 Should they prove identical, they will afford an instance of a degree of sea- 

 sonal variation quite unusual in the species composing the genus Spizella. 



160. Melospiza fallax Baird. 



tFringilla melodia, Wilson, Am. Orn. ii. 1810, 125, pi. xvi. f. 4. 



Coue% Newton's Ibis, April, 1865, p. 165. 

 Znnotrichia fallax, Baird, Pr. A. N. S., 1854, 119. 

 Melospiza fallax, Baird, Birds N. A., 1858, p. 481, 

 Common ; permanent resident. Habits, manners and voice precisely 

 those of melodia. 



The locality* whence were described the original specimens of " Zonotrichia 

 fallax" is so near Fort Whipple that, for all practical purposes, it may be- 

 considered the same. Such differences as exist are detailed by Prof. Baird,. 

 ut supra, with whose expressed opinion that the species is of doubtful 

 validity I entirely coincide. 



M. fallax occurs throughout New Mexico, Arizona, and part of Southern. 

 California, and is particularly abundant in the Valley of the Colorado. 

 Westward of the Colorado Desert M. Heermanni chiefly replaces it. The lat- 

 ter species is very probably to be found at Fort Mojave. 



(161.) Melospiza Lincolnii (Aud.) Baird. 



This extensively distributed species, which occurs throughout the United" 

 States and Territories, and south into Central America, has been taken in the 

 Territory by Dr. Kennerly. I have not myself met with it. 



The following Finches most probably remain to be hereafter added to the 

 list : Peiic.ira Cassini Baird, and Embernagra rtijirirguta Lawrence, in the- 

 valley of the Gila and Southern Arizona generally ; Passerculus sehistaceus 

 Baird, on the upper Colorado. (Specimens of the latter species are recorded 

 from Fort Tejon, Cala. ) 



162. Gcikaca cojrulea (Linn.) Swains. 



Generally distributed ; nowhere very common. A single specimen taken 

 near Fort Whipple, Aug. 10, 1865. "Arrives at Fort Mojave May 1st."' 

 ( Cooper.) 



163. Guikaca melanocephala Swains. 



Abundant. Summer resident. Arrives May 1st ; remains until latter part 

 of September. Frequents the thick brush of ravines, etc., and the cotton- 

 wood and willow copses of the creek bottoms. Its ordinary note intimately 



*" Pueblo Creek, New Mexico," is now known as " Walnut" Creek, Arizona, anil is hardly a 

 day's march from Furl Whipple, which lies but a short distance off the trail of Lieut. Whipple's 

 party, in going from the San Francisco mountains to the Headwaters of Bill Williams' River. 



