24 
b. Thighs white, with streaks or spots of 
rufous or brown. 
Below tawny buff, streaked with brown ; 
upper tail-coverts white. 
Below nearly white, streaked with brown. 
Below creamy buff, with pointed spots of 
rufous brown ; upper tail-coverts white. 
Below buffy white, with rufous centres to 
the feathers ; upper tail-coverts white. 
Below creamy white, with streaks of brown; 
upper tail-coverts white, barred with dark 
brown. 
. 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. 
. Thighs rufous. 
Below dark brown, with a white band, 
marked with brown, across breast ; upper 
tail-coverts white, tinged with grey and 
rufous. 
Below brown, streaked with white ; upper 
tail-covetts rufous, tipped with white. 
Gen. XIX. 
C. cyaneus. 
C. hudsonius. 
C. spilonotus. 
C. pygargus. 
C. macrourus 
C. cinereus. 
C. @ruginosus. 
C. vanivorus. 
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. 
N.D. x., p. 327 (1817). 
[Paraguay. ] 
Collared Harrier-Hawk. 
Size large ; length ¢ 20 in., wing 263 mm.; 92 
about 24 in.; above blackish with white 
nuchal collar; tail with 3 white bands; 
49. Micrastur melanoleucus melanoleucus (Vieill.) S. Mexico 
to Colombia, 
Venezuela, 
Brazil and 
Paraguay. 
