97 



162a. Urubitinga urubitinga occidentalis subsp. W. Ecuador, 

 nov. [$ Rio Bogota, W. Ecuador, Type No. 

 11045 in M.C.Z. Harvard.] 



Smaller ; wing ? 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. 



SmaUer ; wing <? 380-395, ? 415-420 mm. ; 

 under wing-coverts and tibiae 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. 



tl63. Urubitinga anthracina anthtacina (Licht.), 

 Preis. Verz. Mexicanische Vogel, p. 3 (1830). 

 [Mexico.'] 

 Mexican Black Hawk. 



Wing S 355-375, ? 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. 



Venezuela and 

 Colombia to 

 Guatemala, 

 Mexico, Texas 

 and S. Arizona. 



163a. Urubitinga anthracina cancrivora Clark. Pr. Lesser Antilles 



Biol. Soc, Wash., xviii., p. 63 (1905). [St. (St. Vincent, 



Vincent.'] St. Lucia). 



Antillean Black Hawk. Trinidad.^ 



*■ The Trinidad bird differs only in the narrower tail band (30 mm.) and slightly 

 more rufous secondaries. 



