22 
Birds of Celebes: Falconidae. 
“Sikip-batta-batta”, Minahassa, Meyer e 2. 
“Sikep abu-abu”, Maiiado, Guillem, b 3. 
“Sikep werreng selak”, Alfurous, Minahassa (Nat. Coll.). 
Figures and descriptions. Schlegeld/I, d 1, d 3\ Bonaparte a i; Kaup e f ; Sharpe 6 2 ; 
G urney f 1\ Briiggem. b 2, 
Adult male. Above slate-gi'ey, blacker on the upper tail-coverts ; quills above blackish, notched 
on the inner webs towards the base of the feathers with wliite; wing below and 
under wing-coverts white, free end of wing below grey; tail black, marked on 
the inner webs of the feathers mth three rows of large white spots, intervals of 
about 25 mm separating the rows; on the outer webs of the feathers almost oblite- 
rated brownish .spots corresponding to the white ones are just discernible ; tail narrowly 
tipped with white, mainly confined to the inner webs; ear-coverts smoke-grey, paler 
on chin and throat; below rufous vinaceous-cinnamon, pahng into whitish on tliighs, 
flanks and under tail-coverts (cf; Tomohon, Minahassa, 7. IV. 94: P. &F. Sarasin); 
bill and cere above the nostrils black; cheeks and orbits orange- 3 'ellow; feet 
deep orange-yellow; iris chrome-yellow (Wall. 2). 
Young. Head and neck dark brown with ferruginous borders to the feathers; entire 
upper surface dark cmnamon-rufoiis, tail varied with black — the rufous predo- 
minating on the outer webs, the black on the inner — and marked as in the adult 
with three rows of large white spots on the inner webs, and tipped on the inner 
webs TOth wliite; under surface fulvous white, marked with long stripes of blacldsh 
brown on the breast and sides, and with a narrow dark streak down the middle of 
the tlmoat; under wing-coverts and base of wing fulvous wliite ; quills below 
reddish, marked on inner webs towards the bases of the feathers with short bars of 
blackish not extending completely across the web. (Manado, Nr. 6733). 
Changing plumage. Another specimen is in a stage midway between the above described young 
plumage and that of the adult: middle parts of upper surface slaty grey as in the 
adult, with some cinnamon-rufous tipped feathers about the occiput and mantle ; first 
primary and one or two of the secondaries cinnamon -rufous, the rest dark slaty; 
shoulders and scapulars cinnamon -rufous varied with slaty; breast vinaceous- cinna^ 
mon varied with a few broad streaks of dark brown, particularly on the left side of 
the specimen (Tondano, Aug. — Sept. 1892: Nat. Ooll. — C 10799). 
A very similar example in process of assuming the adult dress is in the Sarasin 
Collection. (See plate). “Iris, malar skin, and feet yellow; bill black” (q^ imm., Kema 
31. July 1893). 
aments. 
Wing 
Tail 
Tarsus 
Culmen 
from cere 
a. (Nr. 8150) (f Manado . 
170 
148 
55 

b. (Nr. 6731) ad. Manado 
164 
146 
52 
14 
c. (Nr. 6732) ad. Manado . . 
180 
148 
56 
16 
d. (c 10848) ad. Manado, Aug. — Sept. 92 (Nat. Coll.) . . 
165 
145 
55 
15 
e. (c 10849) ad. Manado, Aug.— Sept. 92 (Nat. Coll.) . . 
164 
150 
51 
15 
f. (c 10790) vix ad. Tondano, Aug.— Sept. 92 (Nat. Coll.) 
172 
150 
52 
14.5 
g. (Nr. 6733) juv. Manado 
160 
138 
49 
13.5 
h. (c 10850) juv. Manado, Aug. — Sept. 92 (Nat. Coll.) . . 
164 
144 
51 
15 
(Sarasin Coll.) ^ ad. Tomohon, N. Cel. 7. April 94 
155 
130 
53 
12.5 
j. (Sarasin Coll.) $ ad. Masarang, N. Cel. 9. Oct. 94 
166 
141 
54 
14 
k. (Sarasin Coll.) cf 'ix ad. Kema, N. CeL 31. July 93 
169 
140 
51 
15 
1. (Sarasin Coll.) juv. Kema, N. Cel., 13. Sept. 93 
173 
136 
53 
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