250 NORTH AMERICAN BIRDS. 



Adult with the blackish continuous and uniform. Wing, 12.35 - 14.50 ; 

 tail, 9.80-11.00; culmen, .90-1.10; tarsus, 3.15-3.75; middle toe, 

 1.65-2.00. Hab. Middle America, north into southern border of 

 United States var. liarrisi. 



Parabuteo unicinctus, var. liarrisi (Eidgway). 



HARRIS'S BUZZARD. 



Falco liarrisi, Aud. B. Am. pi. cccxcii, 1831. — Ib. Oni. Biog. V, 30. BiUeo harrisi, AuD. 

 Synop. 1839, 5. — Bonap. List, 3. — De Kay, Zoul. N. Y. II, 11. — Craxirex unicinc- 

 tus, var. harrisi, Eidgway, P. A. N. S. Philad. Dec. 1870, p. 142. Buteo unicinctus, 

 var. harrisi, CoUES, Key, 1872, 215. " Craxirex unicinctus, Temm." Cass. Birds N. 

 Am. 1858, 46. — Deessek, Ibis, 1865, 329 (Texas). — CoUES, P. A. N. S. 1866, 13 

 (Arizona). 



Sp. Char. ^(ZmZ;! 772a?e (17,230, Cape St. Lucas, Lower California; J. Xantus). General 

 plumage uniform sooty-black, purest on the tail, somewhat tinged with chestnut on the 

 rump. Lesser wing-coverts and lateral half of each web of middle coverts, also the 

 tibise, rich deep chestnut, perfectly uniform. Upper and lower tail-coverts, and broad 

 basal and terminal zones of tail, pure white, the anterior band concealed (except on outer 

 feathers) by the upper coverts, and about twice the width of the last, which is about 1 

 inch wide. Tail-coverts with a few irregular narrow shaft-streaks of blackish. Lining 

 of wing deep chestnut, like the shoulders ; each greater covert with a black shaft- streak ; 

 primaries beneath plain black. Wing, 14.50 ; tail, 10.00 ; tarsus, 3.25 ; middle toe, 2.00. 

 Fourth and fifth quills longest and equal ; third considerably shorter; second intermediate 

 between sixth and seventh ; first 3.40 shorter than longest. 



Adult female (42,559, Iztlan, Mexico ; Colonel Grayson). Generally similar to the male ; 

 the black, however, less pure and more brownish, the chestnut more extended, the whole 

 rump being of this color, the last feathers merely being blackish in thig middle. White of 

 tail-coverts without blackish streaks. Wing, 14.60 ; tail, 10.30 ; tarsus, 3.25 ; middle toe, 

 1.95. 



Immature male (second year, 50,763, Tepic, Mexico ; Colonel Grayson). Upper parts 

 similar to adult, but less uniform ; the nape and back with feathers edged with rusty ; 

 sides of head and neck very much streaked. Breast and abdomen light ochraceous, with 

 large longitudinal oval spots of black ; tibiae light ochraceous, with rather distant trans- 

 verse bars of dark rusty-brown ; lower tail-coverts ochraceous-white, with black shaft- 

 lines. Rufous on the wings more extended and more liroken ; none on the rump. Ter- 

 minal band of tail naiTOwer and less sharply defined than in adult ; inner webs of primaries 

 with basal two-thirds white, irregularly mottled with dusky. "Iris chestnut-brown; cere, 

 chin, and space round the eyes yellow." 



Immature female (second year, 15,260, Fort Buchanan, New Mexico ; Dr. Irwin). 

 Black spots beneath larger and more irregularly defined ; tibia; strongly barred with 

 dark rufous; posterior edge of basal band of tail much broken. 



Hab. Middle, or northern tropical, America, from the Isthmus of Panama noithward 



toe, 1.60. Adult female (No. 13,907, Chile ; Lieutenant Gilliss). Similar to No. 13,908, but 

 the tibise more strongly barred. Wing, 12.50 ; tail, 8.30. 



Specimens examined. — National Museum, 9 ; Philadelijliia Academy, 9 ; Boston Society, 4 ; 

 New York Museum, 1. Total, 23. 



Measurements. — $ . Wing, 11.65-13.15; tail, 9.00-10.10; culmen, .82-1.00; tarsus, 

 2.78-3.40 ; middle toe, 1.52-1.75. Specimens, 8. 9. Wing, 12.50-14.60 ; tail, 9.20-10.50 ; 

 ciilmen, .90-1.02; tarsus, 3.10-3.40; middle toe, 1.60-1.85. Specimens, 6. 



