MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 2IJ 



tinct from Myotis, and also from the genus Nycticdus (which is also repre- 

 sented in Pa. and N. J. by a small brown bat) in the number and arrange- 

 ment of the teeth. They tabulate thus: incisors, J'-J j canines, - 1 -" 1 ; 

 premolars, ^ ; molars, -J:J, making in all 32 teeth, of which 18 are in the 

 lower and 14 in the upper jaw. In Florida and the Gulf States this species is 

 represented by a cinnamon-hued race, osceola ; in Mexico and the West 

 Indies by other races ; in the southwestern States by pale, desert forms. 



Measurements. Total length, no mm. (4^ in.) ; tail vertebrae, 45 

 forearm, 45 



Genus Lasiurus, Gray, Zoological Miscellany, 1831, No. i, p. 38. 

 Northern Red Bat ; Tree Eat. Lasiurus borealis (Mtiller). 



1776. Vespertilio borealis Miiller, Natursystem ; Supplement, p. 21. 



1877. Lasiurus borealis Miller, North American Fauna, No. 13, p. 105. 



Type locality. New York. 



Fauna! distribution, Canadian, transition and austral zones ; Ontario to 

 the Gulf States ; Atlantic Ocean to the Great Plains. 



Distribution in Pa.and N.J. Everywhere abundant and apparently resi- 

 dent. 



Habits, etc. Not differing essentially from those of our small bats, except 

 that they resort largely in the day time to the foliage of trees for a resting 

 place, either singly or in pairs. I have never seen large groups or clusters of 

 individuals of this species as in the other kind, nor have I found them in 

 caves, except very rarely a single one near the entrance. I have observed 

 this species returning from apparently extensive flights over the ocean on the 

 N. Jersey coast in the early morning before sunrise. On one or two occa- 

 sions in September single individuals have been observed flying directly 

 toward the shore, so exhausted as to make little progress against a land 

 breeze and alighting on the nearest object as soon as land was reached. It 

 is possible that these had been blown to sea during their migrations along the 

 coast. The flight of this bat is remarkably direct, rapid, strong and lofty, 

 the motion of the long, slender-pointed wings, reminding one of the swift or 

 night hawk. 



Description of species. The color of the red bat is characteristic, separat- 

 ing it at a glance from all others associating with it. It is rufous red through- 

 out, paler on the lower parts. The hairs above are tipped with gray ; their 

 bases are blackish. Some specimens are so profusely tipped with gray as to look 

 like a different race. A marked character of the genus to which the red and 

 hoary bats belong is the densely furred inter-femoral or tail membrane. No 



