321 
during a Cruise in the Caribbean Sea. 
The average lengths of the exposed culmen of male speci¬ 
mens shot by me are as follows :— 
Four males from Los Testigos . . 14*5 mm. 
Five males from St. Vincent . . 14 ,, 
Four males from Grenada ... 13 ,, 
The average length of wings = 62 mm., and of the tarsi 
= 18*5 mm. Females are rather smaller. 
The measurements given by Mr. Ridgway ( ( Birds of 
North and Middle America/ part ii. p. 423) of the only 
specimen in the Smithsonian Institute of Cosreba atrata seem 
to be much larger than is usually the case. 
Holoquiscalus luminosus. 
Quiscaius luminosus Lawr. Ann. N.Y. Acad. Sci., July 1, 
1878, p. 162. 
Five males and one female. 
These specimens agree in every respect with those which 
I obtained in Grenada. It is to be noted that this bird 
is not found on Margarita Island, where its place is taken by 
Quiscaius insularis. It is well represented on the island. 
Cariaco Peninsula. 
We left Los Testigos in the early morning of Jan. 3rd, 1908, 
and after a short stay at Cumana for pratique, proceeded up 
the Gulf of Cariaco and arrived at the Laguna del Obispo at 
dusk. This extraordinary inlet of the sea is situated about 
halfway up the southern rock-bound coast of the Peninsula. 
The entrance to it is very narrow and easily missed. Once 
inside, the voyager finds himself on an irregular sheet of deep 
still water of the deepest blue, studded here and there with 
small islets. Surrounding it on all sides, in the fashion of a 
Scotch loch, are high hills. They present a series of colours 
which vary from rich deep red to deep yellow-ochre. In the 
distance the iron-tinted soil seems in places to be frosted with 
old silver, an effect produced by the patches of silvery-toned 
cactus-scrub. Along the shores, stretches of bright golden 
sand alternate with the deep green of the mangrove-belts. 
Here and there on the lower slopes patches of acacia-trees 
