BRITISH GUYANA BIRDS EGGS. 123 
sea-shore, and at the mouth of the Berbice River, now 
they are never seen there, having migrated to more lonely 
places in the marshes of the interior, where they collect 
in large numbers in the breeding season. I have known 
a tub full of their eggs to be collected at one time. 
They lay two eggs. 
The egg — 52 mm. by 38 mm. — is greenish blue. 
They hatch in April, May and June. — One egg (N°. 36). 
18. Dendrocygna discolor Scl. & Salv. 
Wiscissi Duck. 
They build a flat nest of sticks and grass, among the 
reeds and rushes, near the river-sides or in the swamps, 
in quiet places. Sometimes they build in low trees and in 
the hollow stump of dead palms, Mauritia flexuosa. 
They lay four eggs. 
The egg — 52 mm. by 35 mm. — is white. 
They hatch in August. — One egg (N°. 37). 
19. Columba rufina Temm. 
Pigeon. 
They build, in colonies, flat nests of sticks on moderately 
high trees in lonely places, either on the margin of the 
creeks, or in the trees which grow at the back of the 
savannahs. Isolated nests have been found on trees close 
to houses. 
They lay two eggs. 
The egg — 35 mm. by 28 mm. — is white. 
They hatch in March and in August. — One egg (N°, 32). 
20. Chamaepelia griseola (Spix). 
Ground Dove. 
They make a flat nest of sticks and grass on the ground 
or in low bushes. When they build on the ground the nest 
is composed principally of grass and it is deeper than the 
nest they make in bushes. 
Notes from the Leyden Museum, Vol. XV. 
