Key to Scientific Names in Ornithology

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(Accipitridae; Ϯ Barred Hawk M. princeps) Gr. μορφνος morphnos  dark-coloured; αρχος arkhos  leader, chief  < αρχω arkhō  to rule; "MORPHNARCHUS gen. nov. (Buteonidæ)   TYPE: Leucopternis princeps Sclater.   Similar to Leucopternis Kaup but differing in relatively shorter and stouter tarsus (less than twice as long as middle toe without claw), circular nostril, cuneate feathers of head and neck, and very different coloration, the head, neck, chest and upper parts plain black, the under parts (posterior to chest) white narrowly barred with black; loral and orbital regions nearly nude.    (Mορφνος, dusky, dark; αρχος, a leader or chief.)" (Ridgway 1920).