52 
Pirds of British Guiana. 
panics. In colour tliey reseml)le Swifts: blue blacks, with puff, 
and un(ler-i)arts .uenerally white: there may be chestnut or red- 
disli markini^s. They twitter or warble, both on the wing and 
at rest. The eg^s, from four to seven, are white in Martins, 
and wliite with red spots or purple markings in Swallows. 
Martins are generally smaller than Swallows and the colouring 
is not so bright. Many of them are white-rumped. Sand Mar- 
tins l)uild their nests on the face of cliffs, digging holes in the 
soft clay or sand: the Purple Martin of N. America, in holes of 
trees. There are in all thirteen genera, including more than a 
hundred and tlu'rteen species, of which twenty-six belong to the 
New World. 
Swallows & Martins. — (Colonial) Flinindinidac. 
White-vented Swillow (Onick- 
flyer) Tachvchictit albiventris. 
Chimney S vallow (red-vented) Hirundo crythrogasfer. 
Chalybeate .Swallow ;iron-biue) Progne chalybea. 
Tirown Swillow ,. tapera. 
f Ele<rant-banded Swallow Atticora fasciata. 
Ash-throal'-'d ,, melanoleuca. 
*tDark-blue bright ,, ,, cyanoJenca. 
tCapned ,, ,, pileata. 
fForked ,, ,, fucata. 
Red-throated (scraper-winnfcd) Steln^iilopteryx ruficoUis. 
* ., iiropygialis. 
(To he coiitiiiiicd ) . 
^^M^>- 
Blue Budgerigars. 
from the " Yorkshire Evening Post," Feb. i. IQ18. 
A RARE BIRD FOR LEEDS MUSEUM. 
Mr. John W. Marsden, of Harrogate, the son of a former 
Mayor of Leeds, has presented to the Leeds Philosophical Hall 
a stuffed specimen of the rare tribe of birds known as the Blue 
Budgerigar, which is a variant of the common green parrakeet 
of Australia. Mr. Marsden has succeeded after many years in 
breeding the blue variety, and the one which he has presented to 
the Philosophical Hall recently died in his aviary. There are 
not more than a dozen specimens in the country. 
