DAUBENTON'S BAT, NATTERERS BAT, ETC. 285 



emerge into the broad glare of the lamps. This is likewise the mode of flight when 

 searching for insects in the open fields, where it skims closely and somewhat 

 leisurely over the surface of the crops and grass. 



DAUBENTON'S BAT, NATTEKER'S BAT, ETC. 

 Genus Vespertilio 



Daubenton's bat ( Vespertilio daubentoni) , represented in the illustration below, 

 is a well-known, although local British species, which we select as our first ex- 



DAUBENTON'S BAT. 

 (Natural size.) 



ample of the genus Vespertilio, second only in point of the number of its species to 

 Vesperugo, and the type of the family Vespertilionidce. The bats of this genus have 

 38 teeth, of which there are f incisors and -f cheek-teeth on each side of the jaws. 

 As Dr. Dobson observes, they are easily recognized by the circumstance that the 

 upper incisor teeth are so implanted in the jaws as to diverge from one another ; and 

 also by the large number of the cheek-teeth, which exceeds that obtaining in any 

 insectivorous bats yet noticed, and is only equaled in four other genera, of which 

 three are mentioned later on. Moreover, the second cheek-tooth in the upper jaw, 



