162a. 
162b. 
$163. 
163a. 
97 
Urubitinga urubitinga occidentalis subsp. 
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. 
Urubitinga wubitinga ridgwayt Gurney, 
List Diurn. Bds. Prey, p. 77, 148 (1884). 
[Guatemala. | 
Ridgway’s Black Hawk. 
Smaller ; wing ¢ 380-395, 2 415-420 mm. ; 
under wing-coverts and tibiz 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. 
Urubitinga anthracina anthracina (Licht.), 
Preis. Verz. Mexicanische Vogel, p. 3 (1830). 
[Mexico.] 
Mexican Black Hawk. 
Wing ¢ 355-375, 9 360-370 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 rufous and black. 
Urubitinga anthracina cancrivora Clark. Pr. 
Biol. Soc., Wash., xviil., p. 63 (1905). [S¢. 
Vincent. | 
Antillean Black Hawk. 
W. Ecuador. 
Mexico and 
Guatemala to 
Costa Rica. 
Venezuela and 
Colombia to 
Guatemala, 
Mexico, Texas 
and S. Arizona. 
Lesser Antilles 
(St. Vincent, 
St. Lucia). 
Trinidad. 1 
1 The Trinidad bird differs only in the narrower tail band (30 mm.) and slightly 
more rufous secondaries. 
