BIRDS — PICIDAE — CENTUEUS UROPYGIALIS, 



111 



and better defined. The white of the under parts is of a more smoky tinge, with a general 

 yellowish shade. The gamboge of the abdomen is darker. The tibia is finely barred trans- 

 versely with black. The rump and uj^per coverts are white, the inner web of the inner feather 

 barred with white. The female is similar, but lacks the anterior half of the crimson of the 

 crown. 



A skin (No. 9085) labelled Cejiturus hypopoUus, (Wagl.) by Verreaux, agrees perfectly with 

 the present species. It is, however, very distinct from the true hypopoUus of Wagler in the 

 original description in Isis. 



List of specimens. 



CENTUEUS UROPYGIALIS, B a i r d . 



Gila Woodpecker. 



Cenlurus uropygialis, Baird, Pr. A. N. Sc Ph. VII, June, 1854, 120. (Bill Williams' river, N. M.) 

 Cenfuriis hypopoUus, (Bp.) Pucheran, Rev. et Mag. 1853, 163. (Not Picks {Centurus) hypopoUus, Wagler.) 

 Zebrapicus kmipii, Malberbe, 1855? — (Sclater in letter.) 

 Cenlurus sulfureiventer, Reichenbach, Handbuch, vi, Picinae, Oct. 1854, 410, figs. 4411, 4412. 



Sp. Ch. — Third, fourth, and fifth quills longest, and about equal. Back, rump, and upper tail coverts transversely barred 

 with black and vfhite, purest on the two latter. Head and neck all round pale dirty brown, or brownish ash, darkest above. A 

 small sub-quadrate patch of red on the middle of the crown, separated from the bill by dirty white. Middle of the abdomen 

 gamboge yellow ; under tail coverts and anal region strongly barred with black. First and second outer tail feathers banded 

 black and white, as is also the inner web of the inner tail feather ; the outer web of the latter with a white stripe. Length, 

 about 9 inches ; wing, 5. 



Female with the head uniform brownish ash, without any red or yellow. 



Hab. — Lower Colorado river of the West. 



This very distinct species combines the peculiar characteristics of both 0. carolinus and 

 flaviventris. The tail is marked almost precisely like the former, except that the first and second 

 outer feathers are banded across with black and white^ instead of this being confined to the 

 outer, and less distinct. It difi'ers in the yellow belly and restricted small patch on the crown. 

 It agrees -with flaviventris in the color of the abdomen and in the small quadrate patch of red 

 on the crown ; it differs, however, in lacking the orange yellow patch on the nape and the 

 gamboge band before the eyes. The rump and upper coverts are banded white and black, not 

 pure white ; the innermost tail feather is banded and streaked with white, not uniform black. 

 The region about the thighs and arms is much more strongly barred. The head and under 

 parts are more smoky brown in tinge. The bill is considerably more slender. 



Specimens do not vary much. Sometimes there is a smoky brown wash on the back. In one 

 female from the Gila river the head is considerably lighter, with a tinge of yellow. 



