24 



b. Thighs white, with streaks or spots of 

 rufous or brown. 



Below tawny buff, streaked with brown ; C. cyaneus. 



upper tail-coverts white. 



Below nearly white, streaked with brown. C. hudsonius. 



Below creamy buff, with pointed spots of C. spilonotus. 



rufous brown ; upper tail-coyerts white. 



feelow buffy white, with rufous centres to C. pygargus. 



the feathers ; upper tail-coverts white. 



Below creamy white, with streaks of brown; C. macrourus 



upper tail-coverts white, barred with dark 



brown. 



c. Thighs white, barred with orange tawny. 



Breast brown with white spots; rest of under 

 parts barred with orange tawny and white ; 

 upper tail-coverts white, barred with 

 reddish. 



C. cinereus. 



d. Thighs rufous. 



Below dark brown, with a white band, C. ceruginosus. 



marked with brown, across breast ; upper 



tail-coverts white, tinged with grey and 



rufous. 



Below brown, streaked with white ; upper C. ranivorus. 



tail-coverts rufous, tipped with white. 



Gen. XIX. MICRASTUR Gray (1841). 

 Type Falco brachypterus Temm. = M. melanoleucus. 



Nostrils round, with a bony excrescence ; tarsi 

 and feet large and robust ; tarsus reticulated be- 

 hind ; in front covered with small scutellae. 



49. Micrastur melanoleucus melanoleucus (Vieill.) 

 N.D. X., p. 327 (1817). [Paraguay.] 

 Collared Harrier-Hawk. 



Size large ; length <J 20 in., wing 263 mm. ; ? 

 about 24 in. ; above blackish with white 

 nuchal collar ; tail with 3 white bands ; 



S. Mexico 

 to Colombia, 

 Venezuela, 

 Brazil and 

 Paraguay. 



