50 
sprinkling of hairs towards the front margin on the inside. The 
front margin is thickened. 
The color varies from near cinnamon to clear bister or sepia, al- 
ways being paler below. In our specimens it is bister above and 
hair-brown below. The base of the fur is dusky throughout. 
This species has been reported from various parts of the state, 
and from the adjoining states. Two specimens have been taken at 
different times in 
the chemistry build- 
ing of the Univer- 
stay.) lt. Allen be- 
lieves this species to 
be, on the whole, the 
most common bat 
in the United States. 
However that may be, the red bat has been taken far more often 
in this vicinity. 
It is not usually found hanging by its thumbs or feet, but rests 
with its folded wings flat upon some rough supporting surface, its 
head being down, In this latitude it is one of the species fre- 
quenting caverns and hibernating in them. 
Fig. 9. Head and ear of brown bat. (Allen.) 
RED BAT. 
Lasiurus borealis (Miller). 
Vespertilio borealis Miill., Natursyst., Suppl., 1776, p. 21. 
Atalapha noveboracensis of Kennicott and various authors. 
This species in its various forms is found throughout North 
America to the arctic regions. The typical form is found in eastern 
North America from Canada to Florida and Texas and west to 
Colorado. It is by far the most common bat in this vicinity, or at 
least the one most commonly taken. 
The two species of Lasiurus, namely the red bat and the hoary 
bat, may be distinguished from all the other bats of the state by the 
fact that the portion of the flying membrane between the hind legs 
is entirely covered with thick fur on the outside. The red bat is the 
smaller of the two species. The fore arm is 1.35—1.6 in. (38-43 mm.) 
in length. The ears (Fig. 10) are very short and rounded for a bat, 
and the basal lobe has a notch in front which is lacking in the hoary 
