THE MALAYAN WREATHED HORNBILL. 93 
founded the two species. It is therefore quite as probable that he procured 
the former and not the latter in Arrakan. 
This Hornbill is almost invariably seen in large flocks, flying low^ and^ 
when on trees, not showing the same amount of watchfulness as the other 
species. At Myitkyo, where I had ample opportunities of observing them^ 
I saw them flying in hundreds over the canal-lock and its neighbourhood 
every morning during the earlier months of the year. After crossing the 
Sittang river and the canal they would settle on the Pegu plain_, and spend 
the whole morning hopping about the ground. On shooting them on their 
return to the forests on the east of the Sittang, I found their pouches full 
of earth and snail-shells : the former was probably required for their 
nests, and the latter no doubt they fed largely on. I got an egg in March 
in the forests west of Payagalay, on the Tonghoo road ; it was placed in 
a natural hollow at an immense height in a wood-oil tree, and the female 
was built in with clay. 
480. RHYTIDOCEEOS UNDULATUS. 
THE MALAYAN WREATHED HORNBILL. 
Buceros undulatus, Shaiv, Gen. Zool. viii. p. 26. Buceros pusaran {Raffi.), 
Tick. Ibis, 1864, p. 180 (part.). Rhyticeros obscurus (Gm.), Htime, Nests 
and Eggs, ^. 115. Rhytidoceros obscurus {Gm), Salmd. Ucc. Born. p. 85. 
Aceros plicatus (? Lath.), Bl. B. Burm. p. 69. Rhytidoceros undulatus, 
Elliot, Mon. Bucer. pi. xxxv. ; Tiueedd. Ibis, 1877, p. 292. Rhyticeros undu- 
latus, Hume 8f Dav. S. F. vi. p. Ill; Hume, S. F. viii. p. 86 ; Bingham, S. F. 
viii. pp. 194, 463, ix. p. 159. 
Desc7iption. — Male and female. Similar in coloration respectively to the 
male and female of R. subruficollis , but differing in being larger_, in having 
the wing differently shaped, the secondaries and tertiaries being nearly as 
long as the primaries, and in having several ribs or ridges on the sides of 
both mandibles near the gape. 
The bill and other parts of the bird are similar in colour to those of 
R. subruficollis , except that in both sexes the gular pouch has a blackish 
band drawn across its base, more or less broken in the centre. 
Length 40 inches, tail 12"5, wing 19, tarsus 2*5, bill from gape 8. The 
female is much smaller: length 35 inches, tail 11, wing 17, tarsus 2*2, bill 
from gape 6* 5. 
The Malayan Wreathed Hornbill appears to occur in but few parts of 
British Burmah except in Tenasserim. In this Division Mr. Davison states 
that it is common from Amherst southwards ; and Capt. Bingham obtained 
it in the Thoungyeen valley. I have not met with it in any part of Pegu ; 
