22. Auriparus flaviceps (Sundev.) Baird. Yellow-headed Tit.—Mr. Henshaw while in Arizona met with but few specimens of this curious little species. He attributed their apparent rarity to the lateness of the season at which his observations were made, and doubtless this explanation is the true one; for during the past spring Mr. Stephens found them in abundance both at Cienega Station and Tucson. Nevertheless it is probable that some individuals pass the winter in Arizona, for one of my specimens is dated November 29, and another was killed early in March. A nest taken at Tucson contained three fresh eggs on April 20.
23. Sitta carolinensis aculeata (Cass.) Allen. Slender-billed Nuthatch.—This Nuthatch was common in the pine forests of the Chiricahua Mountains, but the notes do not mention its occurrence elsewhere.
24. Sitta pygmæa Vig. Pygmy Nuthatch.—Equally common with the preceding species in the same locality.
25. Certhia familiaris mexicana (Gloger) Ridgw. Mexican Creeper.—Various writers have attributed the Mexican Creeper to our fauna, either on purely inferential grounds, or from a misconception, which at one time prevailed, regarding the relationship of the form found in California; for up to the present time no undoubted specimens of mexicana have been taken within our boundaries. It accordingly gives me much pleasure to announce the actual occurrence in Arizona of this well-characterized race, of which the specimen mentioned below is perfectly typical. It is the only Creeper which Mr. Stephens met with during the past season, but in the previous year two others, which I have not examined, but which he considers identical with this, were taken in the same locality. All the Arizona specimens obtained by Mr. Henshaw were referred to our eastern form.
66, ♀ ad., Morse’s Mill, Chiricahua Mountains, March 18. Length, 4.80; extent, 7.10; wing, 2.45; tail, 2.25; culmen, .50. “Iris dark brown.”
26. Campylorhynchus brunneicapillus (Lafr.) Gray. Cactus Wren.—I notice little of special interest among the notes accompanying the eight skins which Mr. Stephens collected. He found the bird abundant in all suitable localities, and took several nests and sets of eggs. The unsophisticated young were easily shot, but the adults, even when breeding, were shy and hard to secure.
27. Salpinctes obsoletus (Say) Caban. Rock Wren.—Mr. Stephens makes no mention of finding this species in Arizona during the past season, but he sends me a single specimen taken December 25, 1880, on the San Pedro River.
28. Thryomanes bewicki leucogaster Baird. White-bellied Wren.—The collection includes five specimens of this form, which was apparently met with only in the Chiricahua Mountains and about Tucson. In the former locality it was common along the banks of streams where, however, it kept so closely hidden among the weeds and brush that it was oftener heard than seen. The examples before me are typical.
29. Troglodytes aëdon Vieill. House Wren.—The only House Wren taken is absolutely indistinguishable from many of my Massachusetts specimens, and I accordingly refer it here. Furthermore, I fail to find the characters supposed to distinguish var. parkmani, in any of the several California specimens included in my series. If the latter form really possesses any constant differential characters, I believe they have yet to be defined.
169, ♀, near Tombstone, April 6. Length, 4.80; extent, 6.40; wing, 2.10. “Iris dark brown. Shot among low brush. Not common.”