Birds of Paraguay. 71 
and more numerous; the rufous colour on the chin, throat, 
fore-neck, and sides of neck is darker and duller ; the dark 
bars on the under surface are blacker and much broader; 
the white bar on the sides of the upper neck is broad and 
weil pronounced. Total length 146 inches; culmen, from 
base of forehead, 075; wing 6*8; tail 6 8; tarsus 2 55; 
middle toe and claw 1*45. 
24. Parabuteo unicinctus. 
Gavilan mixto obscuro y canela Azara, Apunt. i. p. 94. 
no. xix. (1802). 
Falco unicinctus Temm. PI. Col. i. pi. 313 (1824 : Rio 
Grande, Brazil). 
Bvteo unicinctus Hartl. Ind. Azara, p. 2. no. 19 (1847). 
Antenor unicinctus Berlepsch, J. f. O. 1887, p. 27 
(Lam bare). 
Parabuteo unicinctus Sharpe, Hand-list B. i. p. 247 
(1899) ; Ihering, Revista Mus. Paulista, vi. p. 337. 
a. $ imm. Sapucay, May 28,1903. Bill of a slate-colour; 
cere yellowish green ; tarsi arid feet yellow; iris brown. 
Mr. Foster says that this specimen was shot on the edge 
of the forest. 
25. Accipiter pileatus. 
Esparvero azulejo Azara, Apunt. i. p. 118.no. xxvi. (1802). 
Falco pileatus Temm. PI. Col. i. pi. 205 (1823: Brazil). 
Accipiter pileatus Hartl. Ind. Azara, p. 2 (1847) ; Sharpe, 
Cat. B. Brit. Mus. i. p. 153 (1874); Beriepsch, J. f. 0. 1887^ 
p. 122 (Paraguay) ; Ihering, Revista Mus. Paulista, vi. 
p. 337. 
a. $ ad. Sapucay, October 18, 1902. Iris orange-red. 
This specimen, which is in full plumage, has the back of a 
dark slate-colour with black shaft-lines; crown black; upper 
wing-coverts dark brown ; tail banded with brown and black ; 
under surface of body of a pale slate-colour with black shaft- 
streaks ; under tail-coverts whitish; thighs, under wing- 
coverts, and axillaries rufous. 
I can find no difference between this example and others 
from Brazil. 
