The holotype of _Spilogale leucoparia_ Merriam, as pointed out above, is an extreme example of the extensiveness of the white areas of the pelage at the expense of the black areas. This feature occurs more often in the southwestern desert areas of the United States than it does farther north. In addition to the extensiveness of the white markings, the other two characters allegedly distinctive of _S. leucoparia_ are broad and much flattened braincase and great degree of inflation of the mastoidal bullae. Although these three mentioned features do distinguish _S. leucoparia_ from _S. indianola_ to the eastward, they seem not to set _S. leucoparia_ apart from _S. gracilis_ to the westward. For example, in Arizona some specimens are extensively white and some others have the braincase flattened and the mastoidal bullae much inflated. V. Bailey (N. Amer. Fauna, 53:339, 1932) refers to a specimen ([Male], No. 147252 USBS) from the head of the Rio Mimbres in New Mexico in which, as our comparisons show, the inflation of the mastoidal bullae exceeds that of any Texan specimen of _S. leucoparia_, the holotype included. Also, at the type locality of _S. leucoparia_, subadult male No. 188467 USNM and adult male No. 188468 USNM are narrower across the mastoidal region than is the holotype. In summary and review, specimens from the eastern part of the range heretofore ascribed to _S. leucoparia_ nearly all have much inflated mastoidal bullae whereas less than half of the specimens of _Spilogale_ from western New Mexico and Arizona have these bullae as greatly inflated; but, in No. 147252 from the head of the Rio Mimbres of New Mexico the inflation of the bullae is more extreme than in any specimen that we know of that has been referred to _S. leucoparia_. If intergradation occurs between _Spilogale gracilis gracilis_ and _Spilogale indianola_ and between one or both of these kinds on the one hand and _Spilogale interrupta_ on the other hand, central Texas would be a logical place to collect intergrades. We suppose that such intergradation will be found to occur and that eventually _Spilogale putorius_ will be the specific name to apply to all of the Recent subspecies of spotted skunks. Until proof of such intergradation is forthcoming we employ current nomenclature. ~Spilogale gracilis microdon~ A. H. Howell A. H. Howell (N. Amer. Fauna, 26:31, November 24, 1906) listed as _Spilogale arizonae martirensis_ one specimen ([Female] sad.-yg., 145886 USBS) from Comondú, which is the type locality of _S. microdon_. Our examination of [Female] No. 145886 convinces us that it is referable to _S. microdon_.