38 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



I. SPECIES OF MYOTIS OCCUERING IN TEMPERATE NORTH AMERICA 

 MYOTIS LUCIFUGUS (LeConte) 



(Synonymy under subspecies) 



Distribution. — From the limit of tree growth in Labrador, Can- 

 ada, and Alaska, southward to Tabasco, Mexico. 



Map 1. — Distribution of Mtotis lucifdgus ; 1, M. lucifdgus lucifugcs; 2, M. 



LUCIFUGDS ALASCENSIS ; 3, M. LUCIFUGUS CABISSIMA ; 4, M. LUCIFUGUS PHASMA : 

 5, M. LUCIFDGUS FORTIDHNS 



Diagivosis. — Size medium among the American species; forearm 

 about 38 (36 to 40) mm.; total length usually about 80 to 86 mm., 

 tail about 36 mm., averaging 45 per cent of the total length (average 

 ratio of tail to head and body in 10 specimens from Nova Scotia, 

 77.8; in 10 from Montana, 76.2; in 10 from the northwest coast, 

 75.8) ; greatest length of skull ranging from 14.0 to 15.8; maxillary 

 tooth row ranging from 5.0 to 5.8 mm.; lower tooth row (excluding 



