NATURAL SCIENCES OP PHILADELPHIA. 45 



My specimens have a large pectoral area dark chestnut brown, not very 

 different in color from the superior aspect of the tail. I have seen other 

 specimens from Fort Tejon, Cala., in which the breast is still brighter 

 chestnut, in marked contrast to the fuliginous brownish black of the rest of 

 the plumage. Utah, New Mexico, Arizona and California seem to constitute 

 the special range of this species or variety. 



B. " Cooperi" has only been taken from Southern California, (Santa Clara 

 County, Cooper,) and, as but a single specimen is known, it is impossible to 

 decide with certainty upon its relations to borealis. 



(12.) Buteo "Harlani Audubon." 



Individuals identified with this supposed species of Audubon by Mr. Cassin 

 and Mr. Lawrence are from New Mexico and California ; so that the bird 

 necessarily ranges over the intermediate ground of Arizona. 



Dr. Bryant considers that the specimens thus identified present nothing 

 incompatible with their being regarded as a variety of borealis. And it is 

 quite probable that the specimen upon which Audubon himself based the 

 name " Harlani 1 ' is really referrible to a state of plumage of borealis. This 

 must be finally determined by examination of the type in the British Museum. 

 But the name " Harlani Aud." is employed by Dr. Bryant in his paper to 

 designate a species radically distinct from borealis in all its variety, and is 

 the one to which the three following names are by him referred. 



13. Boteo " Swainsoni " Bonaparte. 



B. Swainsoni, Bp. Comp. List, 1838, page 3. Cassin, 1. c. 



B- vulgaris, Audubon ; Swainson & Richardson ; but not of European 



authors. 

 B. Harlani, Bryant, 1. c. (Provisionally adopts the name, proposing to 

 accept that of Swainsonii Bp. in event that Harlani Aud. proves to be 

 a variety of borealis.) 

 A species or variety of extensive distribution throughout the West. 

 Colorado Chiquito River, Ariz., Dr. G. B. R. Kennerly. I never met with it at 

 Fort Whipple, though, beyond a doubt, it is to be found there. 



Some of the states of plumage of this bird are so exceedingly similar to 

 those of B. vulgaris of Europe, that it has been thus malidentified by certain 

 American writers. See Cassin, B. N. A., pp. 19, 20, 21, for elucidation of 

 changes of plumage, geographical distribution, and synonymy. 



(14.) Buteo " oxypterus " Cassin. 



B. oxypterus, Pr. A. N. S. Ph. vii. 1855, p..282.- Idem, B.N. A. 1858, p. 30. 

 B. Harlani Bryant, 1. c. 

 Not actually detected within the limits of the Territory ; but the original 

 locality whence the type of the species was described is so near the borders 

 of Arizona as to render it most probable that the species will be here- 

 after detected. (Fort Fillmore, N. M., Dr. T. C. Henry.) 



(15 ) Buteo "insinatus" Cassin. 



B. insignatus, Cassin, B. of Cal. and Tex., 1854, p. 102, pi. 31. Cassin, 



B. N. A., 1858, p. 23. 

 B. Harlani, Bryant, 1. c. 

 The known range of this species or variety includes Arizona. 

 The bird first characterized by Hoy and subsequently by Cassin as B. 

 Bairdii (by Dr. Bryant also referred to " Harlani Aud.,") has not, to my 

 knowledge, been taken as far south as Arizona, though detected at various 

 other points in the West. 



16. Buteo elrgtns Cassin. 



Rare ; and only known as an inhabitant of Arizona from a single specimen 

 taken on the Colorado Chiquito by Dr. Kennerly. I am informed by Dr. 

 Cooper that it is an abundant bird in Southern California. It will doubtless 

 be hereafter found at Whipple. 



18rj6.] 



