KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 56. N:0 2. 87 
163. Corydon sumatranus. Rarryt. — The Dusky Broadbill. 
Corydon sumatranus: Miller p. 395; Oustalet 1903 p. 63; Gairdner p. 39; Gyldenstolpe II; Gyldenstolpe 
TII p. 229; Gairdner p. 149. 
Sex Locality Date Total length| Wing Tail | Billfr. gape| Tarsus 
mm. mm. mm. mm, mm. 
fou Pak Koh *8/3 1914 230 131 101 35,5 22 
fou Pak Koh 98/5 1914 255 134 99 38 22 
g Koon Tan 28/5 1914 240 129 106 36 23 
fe) Pak Koh 8/4 1914 253 136 101 36 23 
a Pak Koh 81/3 1914 255 134 102 36 22 
ros Pak Koh 24/3 1914 232 135 96 36 22 
os Pak Koh 4/5 1914 242 134 108 37 23 
Q Hat Sanuk 18/2 1915 263 138 104 37 23 
of Hat Sanuk 18/o 1915 270 134 101 37 23 
Trides: brown. Bill: pink with the tip plumbeous grey. 
Nine specimens of this curious bird were collected in different parts of the country 
both in Northern Siam and in the Siamese Malaya. 
It generally occurs in flocks of about 8 to 10 individuals and they are very tame 
and stupid. When flying they utter a whistling note, which I never heard when the birds 
were resting. Then they made their presence known by a croaking note which could be 
heard rather far away. 
There is very little variation as to the plumage with the exception of the white spots. 
The males are separable from the females by having a greenish gloss on the under- 
parts of the body. This gloss is always absent in female specimens. 
164. Cymbirhynchus macrorhynchus lemniscatus. Rarri. — The Black- and 
Red Broadbill. 
Cymbirhynchus malaccensis: Robinson & Kloss p. 50; Robinson I p. 96. 
Cymbirhynchus nasutus: Schomburgk p. 258. 
Cymborhynchus macrorhynchus: Miller p. 394; Oustalet 1903 p. 63; Grant p. 96; Bonhote p. 68; Gairdner 
p. 39; Gairdner p. 149; Robinson III p. 740. 
Q Hat Sanuk 18/2 1915. L = 225 mm. — Irides: golden green. Bill: greenish blue with yellow base 
and margins. Legs: pale blue. 
This beautiful Broadbill was very rare in every locality visited by the Expedition 
and it was only observed a few times in the Siamese Malaya near the Tenasserim fron- 
tier. 
Three subspecies have been described of this bird. The typical C. macrorhynchus, 
G., inhabits Borneo and is characterized by having no white spots or markings on the 
tail-feathers. 
Then there is C. m. lemniscatus RaFru. which previously has been found in Su- 
matra and the Malay Peninsula to Tenasserim. This subspecies has white bars on the 
