HABITS. The geographical distribution of this race of the White-throated Wren, so far as known, is confined to the line of the United States and Mexican boundary, extending northward up the Valley of the Colorado, as far as Western Nevada. The corresponding Mexican race reaches some distance southward, but has not yet been detected beyond the limits of Mexico. The habits of both races, however, are quite similar, as far as known. Dr. Heermann first met with this Wren in the spring of 1851, on the Cosumnes River. In the following year he procured three specimens on the Calaveras River. He describes it as an active, sprightly bird, having a loud and pleasing song that may be heard a great distance, and which it repeats at short intervals. When found, it was occupied with searching for insects, between and under the large boulders of rock that, in some portions of the river, are thrown together in confused masses, as if by some terrific convulsion of nature. Dr. Kennerly also met with this species in similar localities among the hills bordering upon the Big Sandy, where the rocks are also described as piled up thick and high. They were darting from rock to rock and creeping among the crevices with great activity, constantly repeating their peculiar and singular note. The great rapidity of their motions rendered it difficult to procure a specimen. He did not observe this bird anywhere else. Their occurrence equally in such wild and desolate regions and in the midst of crowded cities indicates that the abundance of their food in either place, and not the absence or presence of man, determines this choice of residence. When first observed they were supposed to nest exclusively in deep and inaccessible crevices of rocks, where they were not likely to be traced. Mr. H. E. Dresser afterwards met with its nest and eggs in Western Texas, though he gives no description of either. He found this species rather common near San Antonio, where it remained to breed. One pair frequented a printing-office at that place, an old half-ruined building, where their familiar habits made them great favorites with the workmen, who informed him that the previous spring they had built a nest and reared their young in an old wall close by, and that they became very tame. At Dr. Heermann’s rancho on the Medina he procured the eggs of this bird, as well as those of the Louisiana and Bewick’s Wren, by nailing up cigar-boxes, with holes cut in front, wherever these birds were likely to build.