144 BIRDS OF LA PLATA 
about, one seemed to be followed without regard to 
the rest.” 
I have often watched Tenioptere of different 
species, also Myiotheretes rufiventris, behaving in a 
similar way, and agree with Mr. Barrows that it is 
‘an amusement in which the larger bird indulges 
simply for the pleasure derived from the exercise of 
his power.” 
DOMINICAN TYRANT 
Teznioptera dominicana 
Above pure white; wings black, with a broad whitish sub-apical 
band across the first six primaries, beyond which the tips are blackish ; 
tail black ; beneath pure white; length 8 inches. Female similar, but 
head above and back cinereous. 
Tuts bird ranges from South Brazil and Paraguay 
to the southernmost pampas of Buenos Ayres. Its 
total length is eight inches. The wings and tail are 
black, the former barred with white; all the rest of 
the plumage in the male is pure white ; in the female 
the upper parts are grey. 
It is to some extent migratory, and usually goes 
in flocks of a dozen or twenty birds, and frequents 
open situations where there are bushes and trees, 
also plains covered with giant grasses. They are 
more social in their habits than T. coronata, but in 
other respects closely resemble it, and are exceedingly 
active, lively birds, and when the flock is on the wing 
continually pursue each other in a playful manner. 
