Alecturus guirayetupa. Vieill. Dict.
Muscicapa psalura, Temm., Pl. Col. t. 286 and 296.
—— risoria, Vieill., Gal. des Ois. Pl. 131.
Yetapa psalura, Less., Tr. d’Orn. i. p. 387.
Le Guirayetupa, Azara, No. 226.
This bird is not uncommon on the open grassy country near Maldonado on the banks of the Plata. It sits generally on the top of a thistle; from which it makes short flights and catches its prey in the air. The two long feathers in its tail appear quite useless to it. It sometimes feeds on the ground. In the stomach of one which I opened there was a spider (Lycosa), and some Coleoptera.
1. Lichenops perspicillatus. G. R. Gray.
Sylvia perspicillata, Gmel.
Œnanthe perspicillata, Vieill.
Ada Commersoni, Less.