. Review of American birds in the Museum of the Smithsonian Institution: pt. 1 . Birds. ViREO. 36T again as a small yellowish spot above the posterior corner, seems quite peculiar. A specimen (male, June 16) from Mazatlan agrees closely in form with the present bird, although rather larger. The first quill is only a little more than half the second. The colors are duller, and the under parts paler; the white markings are less distinct, owing to the worn condition of the feathers. The extension of the range of the species from Southern Guatemala to Mazatlan is an interesting fact, paralleled by
. Review of American birds in the Museum of the Smithsonian Institution: pt. 1 . Birds. ViREO. 36T again as a small yellowish spot above the posterior corner, seems quite peculiar. A specimen (male, June 16) from Mazatlan agrees closely in form with the present bird, although rather larger. The first quill is only a little more than half the second. The colors are duller, and the under parts paler; the white markings are less distinct, owing to the worn condition of the feathers. The extension of the range of the species from Southern Guatemala to Mazatlan is an interesting fact, paralleled by the facts in the case of Hirundo alhilinea, various Tro- chilidae, etc., no specimens of which have hitherto been observed in the intermediate coast of Mexico. The type of the species described above has been kindly furnished by Mr. Salvin. Vireo semijiavus (the type of which I have before me from Mr. Salvin) I can hardly consider as distinct from ochraceus, as it re- sembles it very closely in size, form, and propor- tions. The first quill, in the type, is shorter than in ochraceus—being not quite half the second ; the other quills are as in V. ochraceus. The upper ... _., ^^ Vireo semijiavus. parts are rather brighter green ; the under parts lack the ochrey tinge, and the light markings on the wing are narrower. The same peculiarities of the eye stripe are seen in both types. The difference of coloration is what might be expected between birds killed in January and in April, and the difl'erence in length of outer quills such as is met with frequently in well established species. (No. 428.) Total length, ; wing, ; tail, ; difference between 10th and longest quills, .20; exposed portion of 1st primary, .62, of 2d, , of longest, 5th and 6th (measured from exposed base of 1st primary), ; length of bill from forehead, .54, from nostril, .30, along gape, .60; tarsus, 78 ; middle toe and claw, .52, claw alone, .18; hind toe and claw, .44, claw alone, .20. A s
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