152 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
Fairly rare and only three specimens (1 J, 2 22) were obtained at Koon Tan and 
its surroundings. The birds were generally met with in couples or small parties affecting 
the higher trees where they concealed themselves among the leaves making it very diffi- 
cult to detect them. Suddenly and quite unexpected they disappeared, seldom giving 
even a chance for a shot. 
337. Sphenocercus pseudo-crocopus. GyYLDENSTOLPE.’ 
Plate 3. Fig. 1. 
9 Bang Hue Pong *%/5 1914. L = 253 mm.; W = 167 mm; T = 94 mm.; C = 18 mm,; Tarsus 
== 23 mm. — Irides: reddish grey. Bill: grey. Legs: yellow. 
During my stay at Bang Hue Pong in Northern Siam I obtained one specimen of 
this fine species which has turned out to be new. 
Description: Adult female. 
Forehead, lores, chin, cheeks and upper throat greyish, slightly washed with pale 
green; top of the head, occiput and ear-coverts bluish grey, the latter somewhat paler; 
breast »bistre green (Dauthenay, Répertoire de couleurs p. 296: 2); round the lower nape 
and extending to the upper back a collar of brownish olive, in certain lights shaded with 
vinaceous purple; this collar is followed by a band of »plumbago blue» (Dauthenay p. 
207: 4); rest of back, scapulars, smaller wing-coverts and tertiaries nearest »reseda» 
(Dauthenay p. 294) but with a slight shade of purple, lower back and rump somewhat 
darker and washed with bluish grey; upper tail-coverts bluish grey, some feathers tinged 
with greenish yellow; lower breast, sides of the abdomen and flanks »succory blue» 
(Dauthenay p. 206: 1); thighs dark yellowish grey, edged with creamy white and some- 
times with a subterminal black spot; tarsal feathers and middle of abdomen bright 
lemon yellow; under tail-coverts smoky brown tipped with pale chestnut; smaller upper 
wing-coverts olive grey with a tinge of vinaceous purple; greater wing-coverts tipped with 
yellowish white and with a subterminal brownish black bar, the yellowish white colour 
forming a distinct wing bar; quills dusky brown with narrow yellowish white edges; 
outer secondaries like the primaries but faintly tipped with ashy grey; innermost secon- 
daries entirely ashy grey with an olive tint; axillaries and under surface of wing bluish grey; 
tail above yellowish green, tipped with dark brown; tail below black with a grey apical band. 
In colouration this fine Pigeon utterly resembles Crocopus phaentcopterus viridi- 
frons Biytu. though it is much paler especially on the forehead and the throat. 
It, however, can not belong to the Genus Crocopus because there is no sinuation whatever 
on the inner web of the third quill. The tail consists of 14 feathers and the outer pair 
is not acuminated though it is not as broad as those of C. ». viridifrons BiyTH. with 
which I first mistook it. The greenish yellow colouration of the tailfeathers extends 
further down as in that species, and it is not sharply defined from the dark brown tip. 
Like Sphenocercus korthalst Tem. it has the middle of the abdomen pure yellow. 
It differs, however, from that species among other particulars in not having the third and 
fourth primary sinuated about the middle of the inner web. 
1 Ornith. Monatsber. 1916. No. 2, p. 29. 
