(YETAPA TYRANT.)
+Cybernetes yetapa+, _Scl. et Salv. Nomencl._ p. 43; _White, P. Z. S._
1882, p. 604 (Itapua, Misiones).
_Description._--Above hoary grey, with lineiform blackish
shaft-stripes; wings black, with large chestnut-brown patch
occupying the outer webs of the inner primaries; tail of twelve much
graduated feathers, black; outer web of external rectrices white;
beneath same as above, but rather paler; throat and crissum white;
patch on each side of the neck, and collar across the neck dark
chestnut-brown; under wing-coverts and inner webs of wing-feathers
white; bill pale brown; feet black: whole length 16·0 inches, wing
5·0; tail, extreme rectrix 12·5, middle 2·6. _Female_ similar, but
less bright.
_Hab._ S.E. Brazil, Paraguay, Bolivia, and Northern Argentina.
Azara found this singular species not uncommon in Paraguay, and since
his brief notice of it in the 'Apuntamientos' nothing concerning its
habits has been recorded. It has a somewhat laboured flight, he says;
lives in pairs or families, frequenting low or marshy grounds, where
it perches on the summit of the reeds or bushes, and flies down to the
ground to capture insects. It also occasionally dashes after passing
insects, taking them on the wing. It has a loud whistle, which it
utters frequently without any variation.