University of Kansas Publications
Museum of Natural History
Volume 1, No. 25, pp. 581-590, 5 figures in text
January 20, 1950
University of Kansas
LAWRENCE
1950
University of Kansas Publications, Museum of Natural History
Editors: E. Raymond Hall, Chairman, Edward H. Taylor,
A. Byron Leonard, Robert W. Wilson
Volume 1, No. 25, pp. 581-590, 5 figures in text
January 20, 1950
University of Kansas
Lawrence, Kansas
PRINTED BY
FERD VOILAND. JR., STATE PRINTER
TOPEKA, KANSAS
1950
23-1545
Miller (Proc. Acad. Nat. Sci. Philadelphia, 1902, p. 390, September3,1902) based the name Pipistrellus cinnamomeus on a skin and skull ofa vespertilionid bat obtained on May 4, 1900, at Montecristo, Tabasco,Mexico, by E. W. Nelson and E. A. Goldman. A single specimen wasavailable to Miller when he proposed the name P. cinnamomeus. Dalquestand Hall (Jour. Mamm., 29:180, May 14, 1948) reported three additionalspecimens collected in 1946 by W. W. Dalquest on the Río Blanco, twentykilometers west-northwest of Piedras Negras, Veracruz, Mexico. No otherpublished information concerning this species is known to us, althoughthe name has, of course, appeared in regional lists, for example in the"List of North American Recent Mammals, 1923" (Bull. U. S. NationalMuseum, 128:75, April 29, 1924) by Gerrit S. Miller, Jr.
Additional specimens, nevertheless, are known. Two collected on April 18and 20, 1903, at Papayo, Guerrero, by Nelson and Goldman, are in theBiological Surveys Collection in the United States National Museum. Askin, probably of this species, for which the skull cannot now be found,was taken on October 27, 1904, at Esquinapa, Sinaloa, by J. H. Batty andis in the American Museum of Natural History. This is the skin referredby Miller and Allen (Bull. U. S. Nat. Mus., 144:100, May 25, 1928) toMyotis occultus. Three additional specimens, each a skin with skull,were collected twenty kilometers east-northeast of Jesús Carranza, at200 feet elevation, Veracruz, by Walter W. Dalquest, two on April 13,1949, and one on May 16 of the same year. These are in the Museum ofNatural History of the University of Kansas, as also are the threepreviously reported by Dalquest and Hall (loc. cit.). A total of tenspecimens, from five localities, all in Mexico, thus is accounted for.
On page 392 of the original description—which our study of the holotypeshows to be accurate—Miller wrote: "This bat differs so widely from theother known American species of Pipistrellus as to need no specialcomparisons. Superficially it has much the appearance of an unusuallyred Myotis lucifugus, and only on examination of the teeth do theanimal's true relationships become apparent."[Pg 584] In referring to the teethMiller almost certainly was thinking of the premolars of which there areonly two on each side of the upper jaw and on each side of the lower jawin Pipistrellus, including his Pipistrellus cinnamomeus, whereasMyotis at that time was thought always to have three premolars on eachside of both the upper and lower jaw, except in rare instances where onepremolar might be lacking on one side of one jaw or even more rarely onboth sides of the upper jaw. In his original description of