Key to Scientific Names in Ornithology

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(Tyrannidae; Ϯ Agile Tit Tyrant U. agilis) Gr. ουρα oura  tail; Mod. L. myias  flycatcher  < Gr. μυια muia, μυιας muias  fly; πιαζω piazō  to seize; "Uromyias genus nov.  Nearly related to Spizitornis, but bill much shorter, wider and more depressed; rictal bristles much more developed; crest feathers on apical portion neither attenuated nor decurved; tail proportionately longer and strongly graduated, the distance between the shortest and longest rectrix being at least equal to length of tarsus; rectrices conspicuously pointed at the tip instead of bluntly rounded.  Type Euscarthmus agilis SCLATER" (Hellmayr 1927).