﻿86 



NORTH AMERICAN FAUNA. 



LASIONYCTERIS NOCTIVAGANS (Lo Coute). Silver-haired Bat. 



1831. VespertiJio nociivagans Le Conte, McMnrtrie's Ciivier's Animal Kingdom, I, p. 31, 

 June, 1831. 



1831. Vespertilio auduhoni Harlan, Monthly Amer. Journ. Geol. and Nat. Hist., I, p. 

 220, PI. II, November, 1831 (Philadelphia, Pa.;. 



1835. Vespertilio pulvenilentiis Temminck, Monogr. de Mammalogie, II, p. 325 (Mis- 

 souri River). 



1864. Scotopliiliis nociivagans H. Allen, Monogr. N. Am. Bats, p. 39. 

 1B65. Lasionycteris noctivagans Peters, Monatsber. K. Preuss. Akad. W iss., Berlin, 

 ^pr-64-8/ ^ 



1878. Fesperugo noctivagans Dobson, Catal. Chiroptera Brit. Mas., p. 238. 

 1893. Lasionycteris noctivagans H. Allen, Monogr. Bats N. Am., p. 105. 



Type locality. — Eastern United States. 



Geographic distribution. — Nortli America, from Atlantic to Pacific; 

 probably not breeding south of tlie Transition Zone. 



General characters. — See generic cliaracters given on page 85. 



Color. — The fur is deep, blackish, chocolate brown throughout, many 

 of the hairs on the back, belly, and furred part of interfemoral mem- 

 brane tipped with silvery wliite. The white tips are most numerous 

 on middle of back. They are absent, or nearly so, from face, crown, and 

 throat. 



SlitUl and teeth. — The cranial and dental characters of Lasionycteris 

 noctivagans have been sufficiently described iu the diagnosis of the 

 genus. 



Measurements. — The average measurements of 21 specimens of Lasi- 

 onycteris noctivagans from eight localities are given in the following 

 table : 



Average measurements of 21 specimens of Lasionycteris noctivagans from S localiiies. 



Locality. 



Number of 

 specimens. 



Total length. 



Tailvertebrse. 



. 



c 



Forearm. 



Thumb. 





10 



105. 8 



42.4 



17.1 



7.9 



41.1 



5.3 



Montana : Flatliead Lake 



2?? 



100.5 



41 



1G.2 



7. 5 



42 



4.5 







97 



38 



IG 



8 



89 



4.6 



ISTevacla: Badger 



2$9 



95.5 



32.5 



16 



8.4 



40 



6.2 



Oregon : Blue Mountains 



Id" 



97 



39 



16.4 



8 



41 



6 



Crooked Eiver 



Id 



95 



41 



17 





41.4 



5 



Elgiu 



3 



101 



43 



16.3 



8.9 



43 



4.3 





IcT 



98 



44 



15 



8.6 



41 



6 



73.4 



75 



68 



15.9 

 15.6 

 16 



15.8 

 15. 4' 

 16 

 16 

 16 



14.1 

 14.1 

 12 



1L8 



11 



12 



13.3 



13 



6.7 

 6.2 



5.6 

 6 



5.7 

 6 



Specimens examined. — Total number 105, from the following localities : 



Alberta: Henry House 2 (skins). 



British Columbia: Sumas, 1 (skin, Miller coll.). 



California: Nevada City, 1; Nicasio, 2. ^ 

 Colorado: Rifle, 1, * 

 Massachusetts: Nantucket, 1; North Truro, 6 (skins, Miller coll.). 

 Montana : Flathead Lake, 2. 



