566 DR, O. FINSCH ON THE BIRDS OF TRINIDAD. [June 23, 
States, Peru (Chamicuros), and South Brazil (St. Catharina), con- 
vinces me that I am right in uniting Vireo agilis with V. olivaceus; 
for I am not able to find out a single constant character to distin- 
guish them. Von Pelzeln already remarked (Orn. Bras. ii. p. 73, 
note 1) the only difference might be that /”. olivaceus has the first 
primary equal to the fourth, whilst in V. agilis the first is equal 
to the fifth; but in my experience these differences are not con- 
stant and cannot be considered of specific value. In one North- 
American specimen the first quill is equal to the sixth, in the other 
to the fifth, as in a Trinidad one; in the other specimen from 
Trinidad the first quill is shorter than the fifth, in a Brazilian 
one a little longer, and in a Peruvian specimen of an intermediate 
length between the fourth and fifth. All the specimens have full- 
grown quills. With respect to the coloration, there is not difference 
sufficient to distinguish more than one species. ‘The Trinidad skins 
agree in every respect with those from North America, as well as with 
the Brazilian specimen ; the latter, collected by Mr. Burmeister, jun., 
is in general somewhat darker ; the Peruvian one is duller above, the 
under tail-coverts are much paler, showing only a faint tinge of 
yellow; but, as we learn from Mr. Cassin (B. N. Am. p. 332), this 
is only an individual difference, for in North-American specimens the 
under tail-coverts “are sometimes almost entirely white.’ The size 
varies much. 
As noticed by Professor Reinhardt, this little bird has been pro- 
cured once in Greenland. Greenland and the southern portion of 
Brazil inhabited by one and the same species is a striking instance 
of the very extended distribution of many birds, at which I should 
feel much astonished if I had not met with numerous examples of 
the same kind in African ornithology. 
Fam. ForMICARIID&. 
THAMNOPHILINE. 
42. CycLtoruis FLAvipectus, Scl. P. Z. S. 1858, p. 448, Cat. 
p- 45; Léot, p. 263; Taylor, Z.¢. p. 81. 
? Cyclorhis subflavescens, Cab. J. f. Orn. 1860, p. 405. 
Three specimens. 
This species is closely allied to C. wiedi, Pelz. (Orn. Bras. iii. 
p- 1387; T. guianensis, Neuw.; C. viridis, Burm., nec Cab.), from 
Brazil; but the head above is more decidedly grey, the rufous frontal 
and superciliary stripe broader and darker, and the legs are not lead- 
coloured, but light fleshy yellowish, this latter being the chief 
character. 
Two old specimens have the head grey, only at the occiput washed 
with a dull brown; a third one has the whole upper surface of the 
head tinged with reddish olive, and the white on the abdomen also 
washed with a very faint tint of isabelline colour. ‘This one, being 
in moult, is undoubtedly a young bird, and agrees very well with 
