﻿PiPISTRELLUS. 



87 



Nebraska: Platte River, 1. 

 Nevada : Badger, 2. 



New York: Lake George, 6 (2 skins); Leyden, 14; Locust Grove, 4; Lyons 



Falls, 4; Sing Sing, 47 (26 young). 

 North Carolina; Magnetic City, 1 (skin). 



Oregon: Beaverton, 1 (skin, Miller coll. ) ; Blue Mountains, 1 ; Crooked River, 

 1; East base Cascade Mountains, near Mount Thielson 1 (skin); Elgin, 3; 

 Harney, 1; Salem, 1. 



Pennsylvania: Carlisle, 1. 



General remarlcs. — Lasionycteris noctivagans is one o.f tlie most easily 

 recognized of Nortli American bats. Its peculiar color alone is suffi- 

 cient to distinguish it from all otliers found in the region where it occurs. 



Genus PIPISTRELLUS Kaup. 



1829. Pipistrellus Kaup, SkizzirteEntwick.-Gescli.,u.Natiirl. Syst. d. Europ. Tliierw., 



Th. I, p. 98. Type Vespertilio iiiimireJlns Schreber. 

 1839. Vespervgo Keyserling & Blasius, Wiegmann's Arcbiv f. Naturgesch., 5ter 



Jahrg., Bd. 1, p. 312 (part). 

 1856. Nannugo Kolenati, Allgem. Deutsch. Naturbist. Zeitg., Dresden, Neue Folge 



II, 131, 169-172. Based on nathnsii , pipistrelhis, and kuhlii. 

 1856. Hypsugo Kolenati, Allgem. Deutscb. Natnrbist. Zeitg., Dresden, Neue Folge, 



II, pp. 131, 167-169. Included tbe species maurus and Icrasclieuinikowii. 

 1864. ScotophUus H. Allen, Monogr. N. Am. Bats, p. 27 (part, not Seotoplulus Leacb). 

 1878. Vesperugo Dobson, Catal. Cbiroptera Brit. Mus., p. 183 (part). 

 1893. Vesperugo H. Allen, Monogr. Bats N. Am., p. 121. 



Type species. — Pipistrellvs pipistrellus (Schreber). 



Geographic distribution of genus. — The greater part of the Eastern 

 Hemisphere, and throughout the southern half of North America. Exact 

 limits of distribution not known. 



Generic characters. — Dental formula: 



3=3 ' 1-1 ' ^ ' 2=2 ' ' 3=3 ~ • 

 Skull (figs. 21 and 22) small and lightly built, varying somewhat in form 

 among the different species. Braincase usually more inflated than in 

 Vespertilio and Lasionycteris.^ but rostrum proportionally as broad as in 

 these genera. Ears (fig. 20) distinctly longer than broad and tapering 

 to a narrowly rounded tip. Tragus straight or slightly curved for- 

 ward. Back of interfemoral membrane sprinkled with hair on basal 

 third. Mamnme, 2. 



General remarks. — The members of the genus Pipistrellus may be 

 recognized by their dental formula and small size. The bats of the 

 European gemis, Pterygistes ^ {Pterygistes noctula and P. leisleri), which 

 have the same dental formula, are large, heavily built, and altogether 

 different in appearance.^ 



'^Pterygistes Kaup, Skizzirte Entwick.-Gesch. u. Naturl. Syst. d. Europ. Tbierw.,Tb. 

 I, p. 100, based on Vespertilio proterusKvihl {=V. noctula Schreber) and V. leisleri Knhl. 



^For remarks on tbe generic cbaracters of ' JSfoctulinia ' {—Pterygistes), see H. Allen, 

 Proc. U. S. Nat. Museum, 1893, p. 30. 



