462 Field Museum oe Natural History — Zoology, Vol. XI. 



but no definite localities are given. Hahn states that it occurs through- 

 out Indiana; Adams records it from Michigan; Herrick from Minne- 

 sota; and Allen from Iowa. 



So far as known, its habits are similar to those of the Little Brown 

 Bat, which it closely resembles. 



Genus LASIONYCTERIS Peters. 



Lasionycteris Peters, Monatsb. K. Preuss. Acad. Wiss. Berlin, 1865 

 (1866), p. 648. Type Vespertilio noctivagans LeConte. 

 Skull somewhat flattened; rostrum broad; ears short and broad; 



tragus straight and blunt (not pointed) ; interfemoral membrane 



furred on upper surface for about half its length. 



Dental formula: I. ^-^, C.^—^^ Pm. ^^, M.^^=36. 

 3^3 i-i 3-3 3~3 



This genus is peculiar to North America and, so far as known, is 



represented by a single species. 



Lasionycteris noctivagans (LeConte). 

 Silver-haired Bat. Silvery Bat. 



V[espertilio] noctivagans LeConte, McMurtrie's Cuvier Animal Kingd., I, 1831, p. 



431- 



Vespertilio noctivagans Lapham, Trans. Wis. State Agr. Soc, 1852 (1853), p. 337 

 (Wisconsin). 



Vespertillio noctivagans Kennicott, Trans. 111. State Agr. Soc., I, 1853-54 (1855), 

 p. 578 (Cook Co., Illinois). 



Scotophilus noctivagans Allen, Proc. Bost. Soc. Nat. Hist., XIII, 1869 (1871), 

 p. 187 (Iowa). Strong, Geol. Wis., Surv .1873-79, 1- 1883, p. 437 (Wisconsin). 



Lasionycteris noctivagans H. Allen, Bull. U. S. Nat. Mus., No. 43, 1893, p. 105 

 (Illinois). Herrick, Geol. & Nat. Hist. Surv. Minn., Bull. No. 7, 1892, p. 34 

 (Minnesota). Evermann & Butler, Proc. Ind. Acad. Sci., 1893 (1894), 

 p. 134 (Indiana). Rhoads, Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 205 

 (Tennessee). Miller, N. Amer. Fauna, No. 13, 1897, p. 86. Snyder, Bull. 

 Wis. Nat. Hist. Soc, II, 1902, p. 126 (Wisconsin). Jackson, Bull. Wis. Nat. 

 Hist. Soc, VI, 1908, p. 32 (Wisconsin). Hahn, Ann. Rept. Dept. Geol. & 

 Nat. Resources Ind., 1908 (1909), p. 627 (Indiana). Wood, Bull. 111. State 

 Lab. Nat. Hist., VIII, 1910, p. 574 (Illinois). N. A. Wood, 13th Rept. Mich. 

 Acad. Sci., 191 1, p. 134 (Charity Islands, Saginaw Bay, Michigan). lb., Mich. 

 Geol. & Biol. Surv., Pub. IV, 191 1, p. 312 (Michigan). 



Type locality — • Eastern United States. 



Distribution — Greater portion of North America, from the Atlantic 

 to the Pacific, north to Quebec, the Hudson Bay region and south- 

 ern Alaska; south to California, Colorado, Tennessee and Georgia. 



