Recently Karl W. Haller (1940) described "a new wood warbler from West Virginia" from two specimens, male and female, which he collected on May 30 and June 1, 1939, respectively, at points 18 miles apart, and proposed for it the new name _Dendroica potomac_, Sutton's warbler. These birds resemble the yellow-throated warbler in plumage but lack streaks on the sides. They also suggest the parula warbler in having a faint yellowish wash on the back and, in the male, "an almost imperceptible hint of raw sienna" on the upper breast. The male sang a song much like the parula's, but doubled by repetition. Two more Sutton's warblers have been carefully observed in the field: one at the point where the type was collected on May 21, 1942, by Maurice Brooks and Bayard H. Christy (1942); the second about 18 miles to the westward on June 21, 1944, by George H. Breiding and Lawrence E. Hicks (1945). Another aberrant warbler has been described by Stanley G. Jewett (1944), who examined four specimens which show a curious intermingling of the plumage characters of the hermit and Townsend warblers. [AUTHOR'S NOTE: Since the above was written, Kenneth C. Parkes (1951) has published a study of the genetics of the golden-winged--blue-winged warbler complex, to which the reader is referred.] MNIOTILTA VARIA (Linnaeus) BLACK-AND-WHITE WARBLER CONTRIBUTED BY WINSOR MARRETT TYLER PLATES 1-3 HABITS The black-and-white warbler is one of the earliest spring warblers to reach its breeding-ground in the Transition Zone. Most of the other members of this family arrive in or pass through the region in mid-May or somewhat later, according to the season, when the oaks are in bloom and the opening flowers attract swarms of insects. The black-and-white warbler, however, owing to its peculiar habit of feeding on the trunks and the large limbs of the trees, does not have to wait for the bounty supplied by the oaks but finds its special feeding-ground well stocked with food long before the oaks blossom or their leaves unfold. It comes with the yellow palm warbler late in April, when many of the trees are nearly bare, and not long after the pine warbler. _Mniotilta_ is a neat little bird, dressed in modest colors, at this season singing its simple but sprightly song as it scrambles over the bark--the black-and-white creeper, Alexander Wilson calls it.