Volume 7, No. 10, pp. 583-586
November 15, 1954
University of Kansas Publications, Museum of Natural History
Editors: E. Raymond Hall, Chairman, A. Byron Leonard,Robert W. Wilson
Volume 7, No. 10, pp. 583-586
Published November 15, 1954
University of Kansas
Lawrence, Kansas
PRINTED BY
FERD VOILAND, JR., STATE PRINTER
TOPEKA, KANSAS
1954
by
Rollin H. Baker
The eastern pipistrelle, Pipistrellus subflavus (Cuvier) in the westernpart of its range, occurs along the Río Grande and its tributariesas far west as northern Coahuila and Val Verde County, Texas.Specimens from those places represent a heretofore undescribedsubspecies which may be named and described as follows:
Pipistrellus subflavus clarus new subspecies
Type.—Female, adult, skin and skull; No. 48270, Univ. Kansas Mus. Nat.Hist.; 2 mi. W Jiménez, el. 850 ft., Coahuila; 19 June 1952; obtained by RollinH. Baker, original No. 2062.
Range.—Known from northern Coahuila and adjacent parts of southwesternTexas.
Diagnosis.—Size large (see measurements); upper parts pale, near (c)Cinnamon-Buff (capitalized color term after Ridgway, Color Standards andColor Nomenclature, Washington, D. C., 1912); skull large; zygomata expandedlaterally.
Comparisons.—Compared with Pipistrellus subflavus subflavus (specimensfrom Marshall Hall in Maryland, Raleigh in North Carolina, and Barber Countyin Kansas) P. s. clarus is paler, of approximately equal size, and has thezygomata slightly more expanded laterally. From Pipistrellus subflavus veracrucis(Ward), specimens from 4 km. E Las Vigas, el. 8500 ft., Veracruz, P. s.clarus differs in being larger, paler, and in having a larger skull.
Remarks.—Pipistrellus subflavus clarus is the palest subspecies ofthe eastern pipistrelle. Of the specimens assigned to clarus (alltaken in May and June), only two are sufficiently dark to comparefavorably with examples of typical subflavus. A specimen (KU60296) assigned to P. s. subflavus from Rancho Pano Ayuctle, el.300 ft., 6 mi. N Gómez Farías, Tamaulipas, is much darker thanclarus. A specimen recorded from Devils River, Texas, by V. Bailey(N. Amer. Fauna, 25:211, October 24, 1905) has not been examinedby me but presumably is P. s. clarus.
Pipistrellus subflavus clarus was taken along the Río San Diegoand the Río Sabinas, both tributaries of the Río Grande, where park-likestands of pecan, cypress, willow and other trees bordered thesestreams. The species was not found at