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 Nov., I9OI. [ THE CONDOR t55 generous sprinkling of I,ower Sonoran birds is found, induding Zamelodia melano- cephala, Dendroica testira and Pipilo maculatus megalonyx, while many birds of the Canadian zone extend down as low as 3.700 feet and are found breeding abun- dantly. Splrapicus tuber, D3,obates villosus hyloscopus and 6),anocitta stelleri fron- lalis nmy be considered typical of Transition, while the more typical forest trees of this belt are the yellow pine (Pitusponderosa), sugar pine (Pinus lambertiana), incense cedar (Libocedrus decurretzs) and Douglas spruce (Pseudotsuga mucronata). ON TH UMMIT OF PYRAMID PAK. The Canadian zone along the route may be included in the region lying be- tween 5,ooo feet altitude and the summit with its average elevation of 7,500 feet, irrespective of its numerous peaks. Here we find Sbhyrabicus thfroideus, Deidra- gapus obscurus./ult,-ino.ns and bccolhrausles vespertitus monlanus, and such trees as the lodgepole pine (/iutts .ttrcl,ana ), red fir (Abies magnifica), silver pine (Pinus monlicola) and juniper (./unilSerus occidentalis). The Hudsonion zone proper is encountered from about 8.ooo feet upward on the slopes of the higher peaks, typi- cal birds being Aruci/?a.,'a cobtntbiaua, Zototrickia lettcophrys, S]bimts ]binus and Reg- ulus calotdula. This region is characterized by its hemlock forests. The Alpine zone on Pyramid and other peaks is a narrow belt above timber-line and the only bird observed was Leucosticle lephrocotis. RECENT WORK IN THE REGION. This brief survey is intended to cover only comparatively recent work in the region under consideration. Mr. W. W. Price made his first investigations in the summer of x893 and has since devoted three months of each year to the explor- ation of the country contiguous to the stage road. His twenty-seven month's ex- perience has made him familiar with even the more remote portions of the region, so that the addition of his notes to the present list insures its reasonable complete- ness. During the summer of x896 Messrs. Wilfred H. Osgood and R. H. Beck made an extended collecting trip from Placerville to Tallac and several particularly inter- esting sets of eggs (including the type se s of Dendroica occidentalis and Cocco-