a7 
162a. Urubitinga urubitinga occidentalis subsp. W. Ecuador. 
nov. [2 Rio Bogota, W. Ecuador, Type No. 
11045 in M.C.Z. Harvard. | 
Smaller ; wing 2 375 mm. ; sub-terminal 
tail band 100 mm., white band narrower. 
162b. Urubitinga wubitinga ridgwayi Gurney, Mexico and 
List Diurn. Bds. Prey, p. 77, 148 (1884). Guatemala to 
[ Guatemala. | Costa Rica. 
Ridgway’s Black Hawk. 
Smaller ; wing ¢ 380-395, 2 415-420 mm. ; 
under wing-coverts and tibie with more 
white ; tail with base white, black basal 
band much wider and central white bar 
less than one-fourth length of tail; black 
of plumage with a glaucous or slaty cast. 
$163. Urubitinga anthracina anthiacina (Licht.), Venezuela and 
; Preis. Verz. Mexicanische Vogel, p. 3 (1830). Colombia to 
[Mexico. | Guatemala, 
Mexican Black Hawk. Mexico, Texas 
and S. Arizona. 
Wing ¢ 355-375, 2 360-370 mm. ;_ black 
above and below; upper and under tail- 
coverts only narrowly tipped with white ; 
tail with a broad (40-60 mm.) white median 
band and white tip; base of primaries 
mottled black and white ; inner webs of 
secondaries mottled with rutous and black. 
163a. Urubitinga anthracina cancrivora Clark. Pr. Lesser Antilles 
Biol. Soc., Wash., xvili., p. 63 (1905). [S¢. (St. Vincent, 
Vincent. | Sts! deucia). 
Antillean Black Hawk. Trinidad. 
1 The Trinidad bird differs only in the narrower tail band (30 mm.) and slightly 
more rufous secondaries. 
