at night, [356]

Fork-tail, [501]

Formicariidae, [469], [479], [488] f.;

habits, [489]

Formicariinae, [488] f.

Formicarius, [488], [489]

Formicivora, [488];

F. caudata, [488];

F. ferruginea, [488]

Fossil Birds, viii, [1] f.