Monograph of the Trochilidae, or family of hummingbirds: Part III
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- Viridian Metaltail plate 193
- Plate depicting: Metallura williami (Delattre & Bourcier, 1846) -- Viridian Metaltail
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- Viridian Metaltail plate 194
- Plate depicting: Metallura williami primolina (Bourcier, 1853) -- Viridian Metaltail. Alternate name, as printed: Metallura primolinus