'I'll 10 Sli.VMIMIAIlv'MI) I', AT. 



of ('oriJiiorJiinus, which, however*. h;is ciionnoiis cnrs. iicnrly 

 e(iuallii]i>" the cut ire body in Icii^i'lh. w h«'i'(';is Ihc cjifs of Ldsioinj- 

 teris are short and hardy reach lo the nostril wluui laid forward 

 along the head. 



LASIONYCTERIS NOCTIVAGANS (Le Coiite). 

 SILVER-HAIRED BAT. 



Vespcrlilio HoclivagaHS Le Conte, MeMurtrie's (Juvier, Animal 



Kingdom, Vol 1, p. 31, 1831. 

 Lasionycteris noctivagans Evermann and Butler, Proc. Ind. 



Acad. Sci. for 1893, p. 134, 1894. 

 Lasionycteris noctivagans Miller. N. Am. Fauna, No. 13, p. 86, 



1897. 



Diagnostic characters. — Color blackish, many of the hairs being 

 tipped with silvery white ; ears short and broad ; interfemoral mem- 

 brane partly furred. 



Description. — The name silver-haired bat may lead the novice 

 to mistake one of the species of Lasiurus for the present one. The 

 silver-haired bat is always to be distinguished from those by its 

 dental formula, by the incomplete furring of the interfemoral 

 membrane, and by the fact that the hairs are dark brown or black 

 except for the white tips on some of them, whereas in Lasiurus the 

 hairs have a broad light band near the middle. No other bat in 

 this region resembles it in color and in the short ears and tragi. 



The ears are short and nearly as broad as long, reaching barely 

 to the nostril when laid forw^ard. The tragus is short and broad; 

 its posterior edge very convex ; anterior edge nearly straight ; tip 

 rounded. The interfemoral membrane is partly covered with hair 

 on the dorsal side. 



Measurements.' — Average of ten specimens from Sing Sing, New 

 York (copied from Miller, N. Am. Fauna, No. 13) : Total length, 

 105.8 mm. (4 3/16 in.) ; tail, 42.4 mm. (1 11/16 in.) ; hind foot, 7.9 

 mm. (5/16 in.) ; forearm, 41.1 mm. (1 11/16 in.) ; tibia, 17.1 mm. 

 (11/16 in.) ; ear (from meatus), 15.9 mm. (10/16 in.). 



Skull and teeth. — The skull (fig. 29) is rather long and slender, 

 with braincase and palate broad, and the rostrum pinched and nar- 

 row. The dorsal outline is nearly straight, the braincase being ele- 

 vated but little above the face. 



Ravge. — North America as far south as Nebraska and Pennsyl- 

 vania, and in the mountains to North Carolina. In Indiana I have 

 never encountered it in the southern part of the State. The locali- 



