2 
Birds of Celebes: Falconidae 
sulaensis of the Sula group, and 3. the individuals inhabiting the Peling group, 
which are intermediate between these two races. For the treatment of this, 
and of similar cases, the following method of nomenclature may be adopted 
without prejudice to ornithology. 
1. The typical Spilornis rufipectus. 
a. Spilornis rufipectus (1) Grould, P. Z. 8. 1857, 222; (II) id., B. Asia, I pi. IX (1860); 
(3) Wall, P.Z. 8. 1862, 338, pt. ; (4) id.. Ibis 1868, 16, 21; fdj Wald., Tr. Z. 8. 1872, 
VIII, 35; (6) 81iarpe, Cat. B. I, 1874, 291; (7) 8alvad., Ann. Mus. Civ. Glen. 1875, 
Vn, 643; (8) Briigg., Abh. Ver. Bremen 1876, V, 46; (9) Glurney, Ibis 1878, 96, 
102; (10) W. Bias., J. f. O. 1883, 135; (11) Gurney, List Diurn. B. of Prey 1884, 
17; (12) W. Bias., J. f. 0. 1885, 403; (13) id., Ztscbr. ges. Orn. 1885, 222; (14) 
Guillem., P. Z. 8. 1885, 544; (15) Hickson, Xat. in X. Celebes 1889, 89; (XVI) 
Meyer, Vogelskel. II 1892, 27, t. CLVH; (17) Biitt., ZooL Erg. Webers Beise 1893 
HI, 271; (18) 8barpe, Ibis 1893, 552; (19) M. & Wg., Abh. Mus. Dresd. 1895 
no. 8, p. 3; (20) ib. 1896 no. 1, p. 7; (21) iid., ib. 1896, no. 2, p. 7; (22) Har- 
tert, Xov. Zool. 1896, 161; (23) id., ib. 1897, 159. 
b. Circaetus bacha celebensis (1) 8cbl, Mus. P.-B. Buteones 1862, 27; (2) Rosenb., Malay. 
Arcbip. 1878, 271. 
c. Circaetus rufipectus (I) 8cbl., Valkv. Ned. Ind. 1866, 37, 72, pi. 23, figs. 1 — 3; (2) Gray, 
HL. 1869, I, 15; (3) 8cbl., Rev. Accip. 1873, 114. 
“Kokodschi”, Tjamba, 8. Celebes, Platen a 13. 
“Berna” (albescent young), Tjamba, Platen a 13. 
“Buliea-mohengo”, Gorontalo Distr., X. Celebes, v. Rosenberg h 2. 
“Kiokkiok”, near Manado, Xat. Coll, in Dresd. Mus. 
“Boina”, Balante, E. Celebes, Xat. Coll. 
“Sikep utang besar”, Lembeb Id., Xat. Coll. 
Figures and descriptions. Gould JJ, i; 8chlegel c I\ Meyer XF7 (skeleton); 81iarpe 6. 
Diagnosis of race. Wing relatively longer than in S. rufipectus sulaeitsis (see, table of mea- 
surements), remiges below greyish white, broadly tipped and barred with blackish. 
These bars coalesce on the secondaries and base of primaries, enclosing spots of 
white, mottled with brown. 
Old female. Upper surface dark brown, glossed with purple; sides and top of head, 
crest, and throat black, ear-coverts washed with grey; hind neck dusky, the 
margins of the feathers here and there, and on the crest, fulvous brown; secon- 
daries and some of the upper tail-coverts tipped with white; carpal edge 
spotted with white; tail above pale brown, tipped with whitish, and crossed with 
four broad black bands — the basal one rather indistinct'; breast mummy-brown; 
remaining under- parts — including under wing- and tail-coverts ■ — darker, the 
lower breast spotted, the sides, abdomen, thighs and under tail-coverts closely barred 
with white; under side of wing broadly barred and spotted with white (Manado, 
Xr. 6682). 
Younger female. Like the above, but the brown of the upper plumage paler and duller 
without so much purple gloss; hind neck pale brown, without (or with only a few) 
yellow-brown margins here and on the crest, the black feathers of which are more 
or less broken up Avith yellowish white; tail crossed with three black bands, the 
