(SPOT-BILLED TYRANT.)
+Muscisaxicola maculirostris+, _Scl. et Salv. Nomencl._ p. 44;
_Durnford, Ibis_, 1878, p. 395 (Centr. Patagonia). +Ptyonura
maculirostris+, _Burm. La-Plata Reise_, ii. p. 462 (Mendoza).
_Description._--Above greyish brown, lores and slight superciliaries
whitish; tail-coverts and tail black, the outer web of the outer
rectrix white; below pale greyish white, whiter on the belly and
crissum; bill black, with the base of the lower mandible yellowish;
feet black: whole length 5·5 inches, wing 3·4, tail 2·4. _Female_
similar.
_Hab._ Chili, Patagonia, Bolivia, Peru, and Western Ecuador.
Prof. Burmeister met with this species near Mendoza, in the mouths of
the large torrents above the city. Durnford found it near the river
Sengalen in Central Patagonia in December 1877.