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Sept., 1912 NOTES FROM TODOS SANTOS ISLANDS 191 Hirundo erythrogastra. Barn Swallow. Quite a colony seemed to be contemplating settling down for the season in one of the caves along the shore. Vermivora celata sordida. Dusky Warbler. This was the commonest bird on the island but was remarkably wild; so much so that the only way I could get one was on the wing. Owing to the lack of suitable bushes and small trees, they seemed to confine their nesting operations to a vine resembling a clematis, that grows over vegetation a couple of feet high. From a nest in this growth I flushed a bird by almost stepping on it. The four fresh eggs were in a dainty cup built of a silvery lichen that grows on almost everything in sight. The structure was lin.ed with finer pieces of the same sort of lichens, making one of the most beautiful nests I have ever seen. Although I spent many hours tramping all over the island, the birds failed to reveal even the approximate location of another nest. Salpinctes obsoletus. Rock Wren. Two pairs of these birds had selected nesting sites, and were not only anxious to let the whole world know it, but were willing to show the exact spot to anyone interested. Sialia mexicana occidentalis. Western Bluebird. A pair appeared near camp on the nineteenth but were not present afterwards. SOME BIRDS OF THE SAW-TOOTH MOUNTAINS, IDAHO By STANLEY G. JEWETT t URING the fall of 1910 I was sent into the Saw-tooth Mountains of Idaho to do some zoological collecting. I arrived at Ketchum on October 24 and left the mountains on December 20, after working at Ketchurn in the Wood River Valley, and at the Boston Mine near the source of Rook's Creek. Side trips were made to the sources of Warm Spring and Baker Creeks, up to 9000 feet elevation. Wood River Valley at Ketchum is bordered with groves of aspens and cottonwoods alternating with extended thickets of williow. A few miles above the town the valley closes up to a narrow canyon with steep slopes on either side clothed with a heavy forest of Douglas spruce and Murray pine. In the vicin- ity of the Boston Mine on Rook's Creek most of the southern slopes are bare of forest trees, but clothed with a thick carpet of grass and sage-brush (.4rtemisia tridentata), while the northern slopes and canYOns are well covered by such forest trees as Douglas spruce, Murray pine and lodge pole pine. This entire region is in the Saw-tooth National Forest Reserve, and is used for sheep grazing from July until September. The summer climate is delightful but frosts occur irregu- larly throughout the year, so no attempt at farming is made. Wood River and all its tributaries are well stocked with trout, and deer, bear and goat are fairly plentiful a few miles back from Ketchurn. At the time of my arrival, October 24, most of the summer migrants, both birds and sportsmen, had left for warmer climates so the following list includes only what I believe to be winter residents. with the exception of one Western Robin (P.m. propinquus) seen October 27 at Ketchurn. Anas platyrhynchos. First seen on November 30; then common during[ De- cember. Along Wood River several warm springs keep the ice thawed out in small