Grey-crowned Flycatcher (Tolmomyias poliocephalus) Science Article 1
The tropical New World flycatchers of the genus Tolnzomyias are small and dull colored, resembling somewhat those of the much better known and more northward ranging genus Enzpidonaz. They are, however, rather heavy-hilled, in this respect resembling the species of RhynchocyclztsH. ellmayr (1927. Cat. Birds of the Americas, Part 5, pp. 273-293) gives all the species of the closely related genera Tolmomyies, Rhynchocyclus and Ramphotrigon the common name Flat-bill, a not very satisfactory appellation.
F. HAVERSCHMIDT, Wilson Bull., 62(4)