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 222 THE CONDOR Vol. XVIII they were seen feeding in the company of American Eared Grebes, Florida Galli- nules and American Coots. While these tiny Grebes are very timid and therefore hard to observe with much satisfaction, they are to us the most interesting of our local water birds, and have afforded us a great deal of pleasure, not to mention the sets which repose in our cabinets. San Antonio, Texas, October 4, 1916. MORE SUMMER BIRDS FOR SAN FRANCISCO COUNTY By MILTON S. RAY WITH PHOTO BY O. J. I-IEINEIVIANN Y LIST of San Francisco County birds in the CONyOS of March, 1906 (pp. 42-44) was based almost entirely on observations in Golden Gate Park and the Presidio Reservation, these' localities having furnished 41 of the 44 listed. Later field work in the Merced Lakes region, in the southeastern corner of the county, has yielded so many species new to the list that I have considered it advisable to publish the present paper. While covering, principally, the notes of Henry W. Carriger, J. Roy Pemberton and the writer, a number of records made by others have also been i/corporated. Although the Farallon Islands form a part of our county, it was deemed, on account of their distance from the mainland, inadvisqble to ificlude the avifauna of those sea islands in the list. There is little doubt also that considered geographically the islands properly be- long to Marin County, being a continuation of the Point Reyes peninsula. Unless otherwise specified all Lake Merced notes refer to the southern lake. "Sum- mer", in the title, is intended to cover the nesting period and hence must neces- sarily cover a large part of spring as well. Several records, including that of the Nighthawk and of the Hermit Thrush, have been omitted owing to the subspecific rank having not been definitely determined. 45. Aechmophorus occidentalis. Western Grebe. While noted by Carriger and myself on Lake Merced at various dates in spring and summer we have no nesting record for this species. A very interesting record is A.M. Ingersoll's, who collected a set of eggs, incubation advanced, on Lake Merced, June 1, 1885. 46. Colymbus nigricollis callfornicus. American Eared Grebe. Noted on various occasions on Lake Merced. 47. Podilymbus podiceps. Pied-billed Grebe. A common nester at Lake Merced through a long season. On August 6, 1911, I collected a typical nest, of decayed vegeta- tion, floating just off the tule-fringed lake-shore with six eggs in which incubation was well along. Mr. A.M. Ingersoll also has eggs of this grebe taken at Lake Merced. 48. Gavia iramet. Common Loon. Noted on Lake Merced July 4, 1911, and other dates. 49. Lunda cirrhata. Tufted Puffin.. Noted on San Francisco Bay near Sausalito in spring. 50. Cepphus columba. Pigeon Guillemot. Found nesting on the rocky shores near the Golden Gate by Geo. W. Schussler, June 5, 1912. Eggs, two, fresh.. (See CONDOR, XVIII, p. 35.) 51. Uria freilie ca[ifern[a. California Murre. Noted on San Francisco Bay near the Golden Gate during the spring months. 52. Larus occidentalis. Western Gull.