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84 THE CONDOR Vol. XV jays.. Two with sets of eggs were destroyed by snow. One new nest was not later examined. One nest having eggs in it was inspected at various times until the young were about six days old, when some tragedy then occurred that left but a ruined home among the drooping branches of a tamarack tree. Seven nests of Sierra Junco (Junco o. thurberi). Two nests with sets of eggs were taken by myself. One of these was peculiarly located, being back ten inches from opening of an old gopher's burrow, and six inches below the edrth's surface. The eggs were out of sight and would have escaped my notice had the. bird not flushed at close range. The situation of the burrow was a slight ridge or mound surrounded at a distance of 25 to IOO feet by huge drifts of snow re- maining from winter storms. All new snow that fell on June 23 melted away within forty-eight hours. Two nests that held eggs when discovered were later found to contain dead nestlings. Two nests held dented and cracked eggs after the snow. One nest and five young were destroyed by some mammal, probably the same that dug the nearby nest of Plumed Quail out of the ground. Sixteen nests of Thick-billed Fox Sparrow (Passerella i. megarhyncha). Two nests and sets of eggs. were taken by myself. Two nests were emptied ef eggs by children. One with two eggs was abandoned before incubation com- menced. One with four eggs was destroyed by sheep feeding on foliage of bush. _Five nests with d?ad nestlings were examined after the snow. Four nests were emptied by jays. One nest containing two pipped eggs was discovered through the actions of a jay that had its feast interrupted. Two nests of Blue-fronted Jay (Cyanocitta s. frontalis). Only examined from beneath. Both nests placed on the inside framework of a snow-shed. Two nests of Western Evening Grosbeak (Coccothraustes v. montanus). One contained but a single nestling a few hours old, when found July 3. On previous day a jay, chased by anxious grosbeaks and vociferous smaller birds, was seen to leave the clump of fir trees in which the grosbeaks' home was locat- ed, at a height of forty feet. I have no doubt but what the jay had feasted on the contents of this nest, and later came back and ate the remaining tidbit, for the nest was found to be empty on July 6. The other nest contained two dried- up nestlings when found by me. Two nests of Cassin Purple Finch (Carpodacus cc?sini). The .jays took ?ggs from both nests. Four nests of Green-tailed Towhee (Oreospi?a chlorura). Nest and four eggs taken by myself. The jays (?) emptied the other nests. Five nests of Western Tanager (Piranga ludoviciana). Two nests and sets of eggs collected by myself. One nest examined from a distance of fifty feet only. The birds were not seen around this nest after the snowfall. Two nests were probably emptied by the jays. Two nests of Tree Swallows (Iridoprocne bicolor). Young in both of them. Six nests of Western Warbling Vireo (Vireosylva g. swainsoni). All six were destroyed, presumably by the jays. Two nests of Calaveras Warbler (Vermivora r. gutturalis). Both aban- doned before completion. Three nests of California Yellow Warbler (Dendroica a. brewsteri). One nest and set of four eggs collected by myself. One destroyed by snow. One emptied by jays (?). This last nest held about two table-spoons full of snow water on June 25. I placed a comer of a pocket handerchief in the nest and siphoned all the water away, then reinforced the weak willow branch on which the nest was attached. My assistauce was evidently appreciated by the birds, for