610 
Birds of Celebes: Treronidae. 
one by Prof. Weber. One of Platen’s birds, mentioned by Prof. W. Blasius 
f2j, is LOW before us; it seems to have the occipital black patch somewhat 
smaller, and the lake-red under tail-coverts deeper in tint. Of Togian birds 
Meyer has remarked (d 2): “My specimens from the Togian Islands (August) 
appear to differ a little, the head being rather violet than black”. The Sangi 
race, P. xanthorrhoiis, is larger, has a larger bill and is of a shade darker green; 
it is interesting to find that specimens from Banka belong to Celebes, but those 
of Biarro, Tagulandang and Gunong Api to Sangi. 
Meyer syllabifies the cry of this Pigeon as ‘hau’, hollow, and difficult to 
imitate. It generally flies in pairs and feeds on fruits. 
260. PTILOPUS CHRYSORKHOUS (Salvad.). 
Sula Black-capped Pruit-pigeon. 
Plate XXXVIII. 
a. Ptilonopus melanocephalus var. (1) Wall., P. Z. 8. 1862, 335, 344. 
b. Ptilopus melanocephalus part. (1) Schl., Ned. Tdschr. Dierk. Ill, 1866, 207; (2) id., 
Mas. P.-B., Col., 1873, 28, 29 (Sula); (3) Elliot, P. Z. S. 1878, 551 (Sula Besi). 
c. Jotreron chrysorrhoa (1) Salvad., Ann. Mus. Civ. Glen. Vn, 1875, 671. 
d. Ptilopus sulaensis (1) Briigg., Abh. Ver. Bremen V, 1876, 81 ; (2) Salvad., Ibis 1876, 385. 
Ptilopus chrysorrhous (1) Salvad., Ann. Mus. Civ. Gen. 1876, IX, 196, Nr. 9; (2) Elliot, 
P. Z. S. 1878, 553; (3) Salvad., ib. 1879, 63; (4) id., Orn. Pap. HI, 1882, 51; 
(5) id.. Cat. B. XXI, 1893, 144; (6) M. & Wg., Abh. Mus. Dresd. 1896, Nr. 2, p. 19. 
For further synonymy cf. Salvadori 5. 
Descriptions. Wallace a 1\ Salvadori cl, 4, 5. 
Adult male. Like P. melanocephalus, but the black occipital patch small, almost confined to 
the nape; gidar stripe orange; vent and shorter under tail-coverts dark orange (cad- 
mium-orange); tail below blackish, broadly tij)ped with grey; sides of lower liind neck 
yellowish green ; under surface of body considerably darker green than the upper (cf , 
Sula Besi, from Boucard — C 10486). 
Measurements. Wing 116 — 120 mm; tail 85 c.; tarsus 20 c.; bill from feathers of forehead 
14.5 — 15 (Sula, 3 adult male examples); wing 109—114 mm (5 adult males, Peling 
and Banggai). 
Distribution. Sula. Islands: Sula Besi (Bernstein h 2, Hoedt h 2), “Sula Islands” (Allen 
a 1, 5j; Peling and Banggai (Nat. Coll, in Dresd. and Tring Mus.); Ceram (Moens 
h 1, b 2j Wall, b 1, b 2). 
Two individuals from Ceram are recorded by Schlegel, who states that 
they are absolutely identical with Sula birds. Most likely the species has 
strayed to Ceram in recent times. The differences of the Sula birds from those 
of Celebes and Java were first pointed out by Wallace, and afterwards con- 
firmed by Schlegel a,nd Salvadori. The last writer speaks of the gular stripe 
as like that of P. melanospilus, but we find it narrower and orange in colour-, 
as against deep lemon-yellow. The Sula race is one of the best-marked of the 
group; on the whole it and the Javan form seem to mark the extreme vai-iations 
