[39] Length 5 inches, expanse 7⁶⁄₁₀, flexure 2⁷⁄₂₀, tail 1⁹⁄₁₀, rictus ⁶⁄₁₀, (nearly), tarsus ⁹⁄₁₀, middle toe ¹⁄₂. Irides dark hazel; feet horn-colour; beak pale horn, culmen and tip darker. Male. Upper parts olive, approaching to yellow on the rump: sides of head marked with a band of orange, extending from the ear to the beak, and meeting both on the forehead and on the chin. Wing quills and coverts blackish with yellowish edges. Tail blackish olive, with yellow edges; the outermost two feathers on each side, have the greatest portion of the inner webs pale yellow. Under parts pale yellow. The crown, rump, tertials, belly, and under tail-coverts, are sparsely marked with undefined patches of pale orange. Female. Nearly as the male, but the deep orange is spread over the whole cheeks, chin, throat, and breast. The head and back are dusky grey, tinged with olive, and patched with the fulvous, much more largely, but irregularly, and as if _laid upon_ the darker hue. The pair of singularly marked Warblers which I describe below, were shot on the 21st and 24th of January at Crabpond. That the male in summer plumage would be much more brilliant than my specimen, I have no doubt, for the latter is inferior to the female, and the patched character of the plumage indicates that a seasonal change was then proceeding. If it has been described in its nuptial livery I have failed to recognise it. The male, which was the first obtained, was hopping about the mangroves, which are abundant at the marshy place named, from the summits down to the very surface of the water; and the female was one of a pair that were toying, and chasing each other through the branches of the same trees. At this time, the ovary was scarcely developed, the ova being distinguishable only with a lens. The stomach, in each case, was filled with a black mass of insects. RED-BACKED WARBLER.[40] _Prairie Warbler._—+Wils.+ _Sylvicola discolor._ _Sylvia discolor_, +Vieill.+—Aud. pl. 14. _Sylvia minuta_, +Wils.+ [40] Length 4³⁄₄ inches, expanse 7, flexure 2³⁄₁₀, tail 1⁹⁄₁₀, rictus ¹¹⁄₂₀, tarsus ³⁄₄, middle toe ⁵⁄₁₀.