304 
Mr. P. R. Lowe on Birds collected 
fertile cross. The series collected by my two friends 
certainly points to hybridizing, the ear-coverts when sullied 
with brown being accompanied by a browner and longer 
crest (M. leucogenys), while pure white ear-coverts accompany 
a shorter and blacker crest (M. leucotis). 
Molpastes magrathi (PI. Y.) has deep orange-coloured under 
tail-coverts, sometimes slightly inclining to crimson. The 
chest varies from uniform ashy grey to grey with more or less 
black mottling, the feathers being black in the centre, w r ith 
ashy margins. I agree with Lieut. Whitehead that, ou the 
present evidence, it is impossible to pronounce these birds 
to be hybrids. They could only be hybrids between 
M. leucotis and M. intermedius, but the latter does not occur 
in Bannu. 
XIII.— Notes on some Birds collected during a Cruise in the 
Caribbean Sea. By Percy 1L Lowe, M.B.O.U. 
The following paper is chiefly based on a collection of birds 
which I made during the winter of 1907-1908, while cruising 
with Sir Frederic Johnstone in his yacht f Zenaida/ It 
includes, among others, notes on the species met with in 
some little-known islands off the north coast of Venezuela. 
Thanks also to Sir Frederic Johnstone, I have previously 
been able to describe the birds of Margarita and Blanquilla 
Islands, while some years ago Dr. Hartert described the 
birds of Curacao, Bonaire, and Aruba ( f Ibis/ 1893, p. 318) ; 
so that my present notes on the birds collected and seen in 
the island groups of Los Testigos and Los Hermanos make 
another step towards completing the account of the birds of 
this interesting chain of islands—the true Leeward Islands. 
In an endeavour to make them still more complete, I have 
added a list of the birds which I met with in the Cariaco 
Peninsula; for not .only must the geological formation 
of this interesting strip of land be referred to the same 
primitive period as is represented in Margarita, Blanquilla, 
