haploöphonæ

from The Century Dictionary.

• In J. Müller's system of classification, a group of passerine birds having a simple bronchotracheal syrinx, as the tyrant-flycatchers: it corresponds to Clamatores or Oligomyodi and is contrasted with Tracheophonæ.
• In Garrod and Forbes's arrangement, a division of Passeres, consisting of the family Tyrannidæ and the genus Rupicola of South America, together with the old-world Pittidæ, Philepittidæ, and Xenicidæ (or Acanthisittidæ): opposed to Tracheophones.