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Remarks (Descriptions are from typical)

The descriptions are from typical specimens of the puzzling bird known as Helminthophila leucobronchialis. Between it and H. pinus there are specimens showing every degree of intergradation. Typical examples are comparatively rare, and the most common form has the breast heavily washed with yellow, the back tinged with olive-green, and the white wingbars washed with yellow; in other words, about intermediate between typical leucobronchialis and typical pinus. This hybrid, color phase, or species-I do not presume to say what it is, for I think some day we may understand its relationships more fully-has been found in Louisiana, from Virginia northward to Connecticut, and as far west as Michigan. Its breeding range apparently coincides with that of H. pinus. Upward of one hundred specimens, representing typical leucobronchialis and various phases of its intergradation with pinus are known, and in the Connecticut River Valley the bird is stated to be more frequent than H. chrysoptera. In general habits it resembles both pinus and chrysoptera. Some individuals sing like the former, some like the latter, while others have notes of their own. (See Fisher, Bull. Nutt. Orn. Club, iv, 1879, p. 234; vi, 1881, p. 245; Auk, ii, 1885, p. 378; Chapman, ibid., iv, 1887, p. 348; ix, 1892, p. 302; Eames, ibid., v, 1888, p. 427; vi, 1889, p. 305; Bishop, ibid., vi, 1889, p. 192; Sage, ibid., vi, 1889, p. 279; x, 1893, p. 208.) Helminthophila lawrencei (Herrick). LAWRENCE'S WARBLER.- Ad. 8.-Forehead and fore part of the crown yellow, rest of the upper parts bright olive-green; wing-bars white; tail bluish gray, the three to four outer feathers marked with white; a black patch on the cheek divided by a yellow line from the black patch on the throat and upper breast; lower breast and belly yellow, under tail-coverts white. Ad. .-Forehead dingy yellow, rest of the upper parts bright olive-green; wing-bars white, tinged with yellow; tail as in the 8, black patches of the & replaced by dusky olive-green.