152 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 



Fairly rare and only three specimens (1 J\ 2 $?) 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 nnexpected they disappeared, seldom giving 

 even a chance for a shot. 



337. Sphenocercus pseudo-crocopus. Gyldenstolpe. 1 



Plate 3. Fig. 1. 



$ Bång Hue Pong 2G / 5 1914. L = 253 mm.; W = 1G7 mm.; T = 94 mm.; C = 18 mm.; Tarsus 

 = 23 mm. — Irides: reddish grey. Bill: grey. Legs: yellow. 



During my stay at Bång Hne Pong in Northern Siarn 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 påle 

 green; top of the head, occipnt 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 ramp 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 spöt; tarsal feathers and middle of abdomen bright 

 lemon yellow; under tail-coverts smoky brown tipped with påle 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 phaenicopterus viridi- 

 frons Blyth. though it is much paler especially on the forehead and the tliroat. 

 It, however, can not belong to the Genus Crocopus because there is no sinuation whatever 

 on the inner web of the third quill. Tlie tail consists of 14 feathers and the outer pair 

 is not acuminated though it is not as broad as those of C. p. vitidifrons Blyth. 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 korthalsi Temm. 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. 



