Our examination of all of the specimens that Howell (_op. cit_.) identified as _Spilogale [angustifrons] angustifrons_ reveals that none of the specimens from the type locality had attained full adult stature; the holotype is a subadult and the other specimens from the type locality are even younger. The small size of these specimens from the type locality seems to have misled Howell into thinking that they were taxonomically distinct from the larger specimens--those from Jalisco, Michoacán and Hidalgo--that he identified as other kinds. ~Spilogale gracilis gracilis~ Merriam In the genus _Spilogale_ four specific names, concerning the status of which we have been uncertain, are listed below in the order of their appearance in the literature. 1890. _Spilogale gracilis_ Merriam, N. Amer. Fauna, 3:83, September 11, type from bottom of canyon, Grand Canyon, Arizona. 1890. _Spilogale leucoparia_ Merriam, N. Amer. Fauna, 4:11, October 8, type from Mason, Mason County, Texas. 1891. _Spilogale phenax arizonae_ Mearns, Bull. Amer. Mus. Nat. Hist., 3:256, June 5, type from near Fort Verde, Yavapai County, Arizona. 1897. _Spilogale ambigua_ Mearns, Preliminary diagnoses of new mammals ... from the Mexican boundary line, p. 3, January 12 [reprinted in Proc. U.S. Nat. Mus., 20:460, December 24, 1897], type from summit of Eagle Cliff Mtn., 2 mi. S of Monument No. 5 of Emory's Survey which, according to Miller (U.S. Nat. Mus. Bull., 128:134, April 29, 1924), is "Eagle Mountain, Chihuahua, Mexico, about four miles south of Dona Ana County, New Mexico." In 1906 (N. Amer. Fauna, 26:1-55, 10 pls., November 24) A. H. Howell's "Revision of the skunks of the genus Spilogale" was published and the four names listed above were retained by him as applying to four species (not subspecies). His map (_op. cit._, pl. 1) showing the geographic distribution of the four kinds looks reasonable enough at first inspection and does not indicate any overlapping of the geographic ranges of the species in question, but if a map be made by plotting the localities of occurrence recorded by Howell (_op. cit._), for specimens examined by him, a notably different geographic distribution is shown. For one thing the geographic ranges of _gracilis_, _leucoparia_, _arizonae_ and _ambigua_ coincide over a considerable part of Arizona. Also, specimens collected in recent years from Arizona and adjoining areas do not readily fit into the "species" recognized by Howell; some specimens are structurally intermediate between two or more of these species and other specimens combine the diagnostic characters ascribed to two or more of the alleged species. For these and other reasons a re-appraisal of the application of the names mentioned above long has been indicated.