36. Dolpicietes obsoletus. Quite a number. Singing. Hirundo erythrogaster. One. Tachycineta thalassina. One. Phalaecorax penicillatus. Large colony on high part of west end. Two, three, and four eggs in nests. Nests of seaweed and grass from island. Phalaecorax pelagicus. Occasional nests here and there on cliffs by east end. One nest high up in Nurse Cove. Built on narrow ledges and not on top of cliffs as the last species. Pitychoramplus alenticus. Nesting abundantly all over. In burrows in soil and among rocks. Fresh eggs, incubated eggs, young of all ages. Young often squeal when taken. Adults have white irises. June 22, 1911. S.S. Farallon I., Cal. × In the afternoon I took a look for petrels near the dwelling houses. I found one under a rock (no burrow) right above the head keeper's house. It was an Oceanodroma homochroa with one fresh egg. There was a smaller rock in front of the bird which afforded it some concealment. After dinner I found another one with a fresh egg near the fog station; it was in a hole quite deep down in a rock pile. The first bird I got emitted a harsh sort of squeal when caught. The usual Pitychoramplus alenticus were met with, young of all ages, eggs, adults. Occasionally the young cry a little when caught. The tendency of all is to get back under cover the minute they are released.