10. Myiodioctes mitratus, Gm. ♂ Pa., 2226.
11. Myiodioctes mitratus, Gm. ♀ Pa., 2228.
12. Icteria virens, Linn. ♂ Pa., 2260.
A specimen in the collection of the Philadelphia Academy, killed by Mr. Krider, has the darker ash of the jugulum of a decided sooty tinge.
A peculiarity in the history of this species is shown in the fact that it is quite abundant in Illinois, Wisconsin, etc., in the spring, and very rare in the autumn; precisely the reverse being the case near the Atlantic border, where only two or three spring specimens have been announced as captured by collectors. It is possible that they go north in spring, along the valley of the Mississippi, and return in autumn through the Atlantic States. Their summer abode and breeding-place are as yet unknown.
