154 BIRDS OF LA PLATA 
The only language of st species is a very low 
plaintive whistle, uttered as a faint protest when 
the nest is approached. 
The upper plumage is olive-green; the entire 
under surface and a stripe on the side of the head 
pure yellow; wing and tail-quills dark. 
ASHY-BLACK TYRANT 
Cnipolegus anthracinus 
Above dull black, a broad bar across the vanes of the inner webs 
of the wing-feathers white; bill plumbeous; feet black; length 6.3 
inches. Female ashy brown; rump, upper tail-coverts, and basal 
portions of tail bright fulvous; wings blackish, with two white 
transverse stripes ; beneath pale fulvous, white on the belly ; bill and 
feet black. 
UNFORTUNATELY very little is yet known about the 
habits of these interesting little Tyrant-birds, for 
which I should like to suggest the common name 
“‘ Spectacular,” for reasons I shall say more about 
when I come to describe the Lichenops perspicillatus, 
a species which undoubtedly belongs to this peculiar 
well-defined group. The plumage of the male ts, 
in most cases, intensely black, and there is a pure 
white bar on the remiges, hidden when the bird is 
perched, and when it flies made doubly conspicuous 
by the peculiar motion of the wings. In all the known 
species the female has a dull brown plumage, lined 
or mottled with dusky tints, and with some portion 
