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 Nov., 1911 ANOTHER FORTNI(]HT ON THE FARALLONES 181 22. Empidonax difficilis difficilis. Western Flycatcher. One taken and another seen near the siren on May 29th. 23. Empidonax trailli trailli (?). Traill (?) Flycatcher. An unknown Empi- donax, certainly not di. ff[ct'/is, was seen on the 29th in company with a Vestern Vood Pewee, but it could not be secured. 24. Corvus c0rax sinuatus. Raven. The nest of the only pair of birds claiming residence on the island had been twice broken up this spring by zealous keepers in the name of their defenceless hens. (It is to laugh, raising fh/fkens on the Farallones.) The birds lingered for some days, but evidently gave up and left for the mainland. 25. Mo10thrus ater artemisia. Cowbird. A solitary iudividual, marked dowu on the 1st of June and secured ou the 2nd, is recognized by Mr. Grinnell as Fig. 53. NEST AND EGGS OF PIGEON GUILIEMO' belonging to his recently elaborated form from the uorthern interior. Its occur- rence so far west of its normal range is certainly of luterest. 26. Carpodacus mexicanus frontalis. House Finch. Eucouraged by the shelter of the cypress grove and Mr. Rosendale's tiny garden, a small colony of these finches have maintained themselves for some years past. Several broods were being 'successfully reared at the time of our visit, although the busy house- holds of the cypress grove were visibly embarrassed over the presence of so much unexpected "company" from the East and South. 27. Passer domesticus. English Sparrow. More unwelcome than harpies at the feast of Ulysses, these wretched interlopers have invaded this sanctuary also. ' Small companies of them from San Francisco visit the islands yearly and return