Feb., 1912. Mammals of Illinois and Wisconsin — Cory. 455 



Subfamily VESPERTILIONINtE. 

 Genus MYOTIS Kaup. 



Myotis Kaup, Skizzirte Entw.-Gesch. u. Natiirl. Syst. der Europ, 

 Thierw., I, 1829, p. 106. Type Vespertilio myotis Bechstein. 

 Form rather slender ; upper incisors 4 ; no fur on interfemoral mem- 

 brane except at the extreme base. The dental formula will readily 

 distinguish this genus from other North American genera belonging 

 to this family. 



Dental formula: I. ^—^, C. ^^^ Pm. --^^ M.^^=s8. 



Myotis lucifugus (LeConte). 

 Little Brown Bat. 



V[espertilio] lucifugus LeConte, McMurtrie's Cuvier Animal Kingd., I, Appendix, 



1831, p. 431- 

 Vespertilio gryphtis lucifugus H. Allen, Bull, U. S. Nat. Mus., No. 43, 1893, p. 80 



(Cook Co. and Cairo, Illinois; Wisconsin; Isle Royale, Michigan). 

 Vespertilio lucifugus Strong, Geol. Wis., Surv. 1873-79, I» 1883, p. 438 (Wisconsin). 



Rhoads, Journ. Cin. Soc. Nat. Hist., XIX, 1897, p. 59 (Mammoth Cave, 



Kentucky). lb., Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 203 (Tennessee). 

 Vespertilio gryphus Evermann & Butler, Proc. Ind. Acad. Sci., 1893 (1894), p. 134 



(Indiana). 

 Myotis lucifugus Miller, N. Amer. Fauna, No. 13, 1897, p. 62 (Illinois, Kentucky, 



Minnesota, Ontario, etc.). Snyder, Bull. Wis. Nat. Hist. Soc, II, 1902, p. 126 



(Wisconsin). Jackson, Bull. Wis. Nat. Hist. Soc, VI, 1908, p. 32 (Wisconsin). 



lb., VIII, 1910, p. 90 (Wisconsin). Hahn, Ann. Rept. Dept. Geol. & Nat. 



Resources Ind., 1908 (1909), p. 621 (Indiana). Adams, Rept. State Board 



Geol. Surv. Mich., 1908 (1909) p. 390 (Isle Royale, Michigan). Wood, Bull. 



111. State Lab. Nat. Hist., VIII, 1910, p. 594 (Illinois). 



Type locality — Georgia. 



Distribution — Practically the whole of North America north of Mexico, 

 except in the southwestern portion and on the Pacific coast ; its north- 

 ern range extends to Labrador, the Hudson Bay region and Alaska. 



Description — General color dull brown (variable in shade) ; under 

 parts paler, often tinged with yellowish, sometimes with gray; 

 tragus bent slightly forward and not sharp-pointed; ear when laid 

 forward not extending beyond end of nose. 



Measurements — Total length, about 3.60 in. (91 mm.); tail, 1.45 in. 

 (37 mm.); hind foot, .40 in. (10 mm.); spread of wings (expanse), 

 about 9 in. 



