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May, 1908 SOME i?ALL MIGRATION NOTES I*ROM ARIZONA 111 Say0rnis nigricans. Black Pheebe. One or two observed in the vicinity of Benson, along the San Pedro River, were the only ones seen. Say0rnis saya. Say Pheebe. Fairly common, both in the Rincons and along the base of the Huachucas. They were in the latter locality when I left, November 8, and would doubtless remain there through the winter months. Cont0pus richards0ni. Western Wood Pewee. The only one seen was a single bird noted near the base of the Huachucas on October 29, probably an unusually late date for the species in this region. My earliest record of a spring arrival in these mountains is May 4 (1903). ]$mpid0nax difficilis. Western Flycatcher. An immature female was secured near the mouth of Miller Canyon, in the Huachucas, on October 1. It was the only individual of the species noted on the trip. My earliest spring record for the species is May 18 (1903). ]$mpid0nax hamm0ndi. Hammond Flycatcher. Two small flycatchers, an adult male and an immature male, were secured in the Huachucas,one at 5000 feet, the other at 5500 feet elevation, which, for the present, at any rate, I feel obliged to refer to this species.' When I shot them I had no doubt that they were some- thing else, and it is with considerable hesitation that I now refer them to ]zammo?zdz'. Through the courtesy of Mr. F. S. Daggett and Mr. Joseph Grinnell I was able to get together quite a series of this species, presenting several points of interest but containing nothing to duplicate.my two birds. Two specimens collected by Mr. Daggett near Pasadena, California, during the same week in September, represent what are probably the extremes of what Mr. Ridgway designates as the "white- bellled" and the "yellow-bellied" phases of plumage. The first is an extremely light colored bird, grayish above and almost white below; the latter very dark colored, dark brownish olive above, breast buffy olive, and abdomen sulphur yellow. My two birds, absolutely alike in coloration, differ from both these, in that, above and below, they are decidedly greenz's/z, with no trace of olive or olivaceous any- where. The throat is gray; in sharp contrast to the rest of the underparts and the abdomen is yellow. Four specimens of hammondi taken in the Huachucas in September, 1895, are all more or less olivaceous on the back. It is possible that these two birds represent a hitherto undescribed species, but as the differences are all of color, there being apparently none of size or proportions, I hesitate to give them a name. They were shot on Nox?ember 2 and 4, making their appearance after a hard storm, no other ]?mpidonaces having been seen for a month. They remained in the topmost branches of the live oaks, kept calling incessantly, and were extremely shy and hard to approach, in all these respects reminding me very much of the little Ornithion imberbe that is found in this region; and it was with a faint hope that they might belong to that species that I pursued them. The two were the only ones seen. Empid0nax griseus Brewster. Gray Flycatcher. An immature female taken at the base of the Huachucas on October 1 was the only one of the species observed. Pyr0cephalus rubineus mexicanus. Vermilion Flycatcher. An adult male seen in the foothills of the Rincon Mountains on September 22 was the only one observed during the trip. 0t0c0ris alpestris adusta. Scorched Horned Lark. 0t0c0ris alpestris 0ccidentalis. Montezuma Horned Lark. Horned Larks were quite abundant on parts of the plains below the Huachuca Mountains, but very irregular in their distribution, there being large areas apparently well adapted to their needs where they could not be found at all. Some of the specimens