NATURAL SCIENCES OF PHILADELPHIA. 49 



dicate that it is one of several, which, as noted by Mr. Cassin, (B. N. A., p. 

 37,) range much farther norih in the western than in the eastern portions of 

 the continent. I have met with it as high up as Fort Leavenworth, on the 

 Missouri River. 



{22.) Ictinia Mississippiensis (Wils. ) Gray. 



As a bird of New Mexico, this species is doubtless to be detected in south 

 -eastern Arizona. 



It is probable that the Asturina nitida remains to be discovered near the 

 Sonoran border. 



23. Circus hudsonicts {Linn.) Vieill. 



An abundant species throughout the Territory, chiefly in its more watered 

 portions. 



24. Halijetus letjcocephalus (L.) Savigny. 



Bald Eagles were frequently observed at different seasons in the vicinity of 

 Fort Whipple. 



25. Aquila canadensis (Linn.) Cassin. 



Rare ; but occasionally observed at different seasons : warranting the belief 

 that it is a permanent resident of the mountains around Fort Whipple. 



(26.) Pandion Carolinensis (Sm.) Bonap. 

 Observed on the Colorado River. 



{27.) Polvborus Audubonii Cass. 



P. Audubonii, Cassin, Pr. A. N. S. Ph. 1865, p. 2, which see for syno- 

 nymy and specific characters. 

 Apparently not a rare bird of the southern and western portions of the Ter- 

 ritory. " Rio Gila and Colorado, near Fort Yuma; abundant ; " Heermann* 



{28.) Craxirex unicinctus (Temm.) Cass. 



Taken by Kennedy and Mollhausen on the Colorado River. (See P. R. R. 

 Survey, Vol. x. pt. iv. p. 20.) Probably a permanent resident of southern 

 Arizona. 



[Note. The following extract from my Journal may be of interest : " Camp 

 on San Francisco River, near mountains of same name, July 13, 1865. A 

 pair of exceedingly large rapacious birds sailed over camp this evening. Their 

 Slight was easy, graceful, firm, and sustained for a long time with no visible 

 motion of the wings, which latter were exceedingly long, pointed and acutely 

 angulated at the carpal joint. In size they about equalled Bald Eagles ; but 

 the shape of the wings and mode of flight were very different and intimately 

 resembled those of the Turkey Vultures. The entire under parts of these 

 birds were pure white; their upper parts were not visible." I could not pro- 

 cure a specimen, nor can I now refer the birds to any species known to me, 

 unless, possibly, they were the Sarcorarnphus papa ; a species which may be 

 included hereafter in our Fauna, though its presence within our limits has not 

 yet been positively substantiated.] 



STRIGIDJSL 



29. Strix pratincola Bonap. 



Common. Resident. One of the most abundant Owls of the Territory. 1 

 have frequently observed it at midday ; on one occasion it was preying upon 

 Black-birds in the middle of a small open reed swamp. 



30. Bubo virginianus (Sm.) Bonap. 



Common ; resident. My specimens incline towards Mr. Cassin's variety 

 pneificus; which was also taken on the Colorado Chiquito, by Dr. Kennerly. 



31. Scops McCalli Cassin. 



Taken at Fort Mojave by Dr. Cooper, who thinks it is scarcely distinct from 



1866.] 4 



