BRITISH GUYANA BIRDS EGGS. 119 
on the low shrubs found on the open savannahs. They 
build in colonies. 
They lay three eggs. 
The egg — 26 mm. by 19 mm. — is grey-green, marked 
with black and purple irregular lines and dots. 
They hatch in March, April and May. — One egg 
(N°. 29). 
These birds when flying a short distance, open their 
tails vertically and use it like the rudder of a boat, but 
if they fly far they open this rudder-like tail from above, 
so that it forms two plains meeting below at asmall angle. 
9. Todirostrum cinereum (L.). 
Pipitoorie, 
They make an oval, hanging nest of grass, hair, and 
the cotton from the seeds of plants on the end of the 
branches of tall trees, or on the trailing branches of vines. © 
The place of entrance is an oval hole in the side of the 
nest and it is protected by an overhanging roof. 
They lay two eggs. 
The egg —17 mm. by 10 mm. —is a long oval, and 
it is pure white. 
They hatch from March to July. — One egg (N°. 23). 
10. Myiozetetes cayennensis (L.). 
Small Kiskadie. 
They make a domed nest of grass on the outer branches 
of low, or of moderately high trees, resembling the nest 
of Pitangus sulphuratus (L.), only smaller; the place of 
entrance is in the side of the nest. Outside the nest is 
very rough and ragged, but inside it is quite the contrary. 
They lay three eggs. 
The egg — 25 mm. by 16 mm. — long and sharp pointed, 
is pink white, with red-brown spots and blotches, especially 
on the large end and round the large diameter. 
They hatch from January to June. — One egg (N°. 22). 
Notes from the Leyden Museum, Vol. XV. 
