Zimmer 1950. Studies of Peruvian birds, No. 55. The Hummingbird Genera Doryfera, Glaucis, Threnetes and Phaethornis, No. 1449 pp. 1-51. Studies of Peruvian birds, No. 56. The genera Entoxeres, Campylopterus, Eupetomena and Florisuga, No. 1450 pp. 1-14. Studies of Per American Museum Novitates, 1950: Unpaginated