REPORT OF STATE GEOLOGIST. 



Family VESPERTILIONIDAE. 



TYPICAL BATS. 



All of the bats found in the United States belong to this family 

 with the exception of a few species along the Gulf coast and in 

 the southwest. The muzzle is simple without any surrounding folds 

 of skin ; the ears are well developed and always have a tragus 

 (fig. 25, t) ; the bony palate is lacking in the middle line anteriorly; 



Fig. 25 — Ear of a bat (Lasiurus horealis) ; c, ear conch ; t, tragus. 



Platk VI L 'J'lic lar^c brown bat (Eptesicus fuscus) walking. After Harrison 

 .Mien, Bull. No. 4.3, U. S. Nat. Museum. 



