JESimpson, 1938 36. 900+ ft., 1/2 mi. s. Crater Elegante, 34 mi. w. Sonoita, Sonora March 27, 1938 all in bloom in the area we have covered. Soon after this shot bagged a Caliope Hummingbird along my trap-line (074967, SBB; march 28, 1938). At almost sun-down set-out so live-traps along banks of small wash in lava field after having run over my mouse-trap-line which had been reset and left all day, but nothing was caught. Eight of the traps were sprung but empty; nine were so this morning—probably from large wood-rats or the larger kangaroo rats. While kneeling beside a white soft-succulent re-setting a trap, I was arrested by a loud, whirring close to my head—a female Rufous Hummingbird was after the flowers of the succulent, probing flowers on various stems, closer and closer, until it was less than a foot from my face—apparently entirely unaware that collector with a hat on was so near. Its wings made a noise not unlike a propellor blade of an airplane (discount the motor noise), its tail moved up and down, openning and partially closing (showing the white-tipped rectrices), its bill opened and closed two or three times before and after insertion into the tiny flowers as it rapidly moved from flower to flower (only a few selected from each group); but I did not observe see its tongue, nor could I ascertain any real picture of the manner of the wing movement other than the extreme rapidity of the beat and the excellence of the technique of maneuvering