Figure 5. — The eastern pipistrelle {Pipistrellus subflavus) 

 and the evening bat {Nycticius humemlis) have a short, 

 blunt tragus (A); the myotids have a long, pointed, 

 sharp tragus (B). 



b. White shoulder patch present, red or mahogany 

 coloration, frosting usually present (except male 

 Lasiurus borealis) — 6 



6. a. Pelage bright, brick-red; tips of hair frosted white 

 (except males); face is light red/yellow — eastern red 

 bat {Lasiurus borealis) 



b. Pelage dark mahogany; tips of hair frosted white; 

 face is mahogany/ red — Seminole bat {Lasiurus 

 seminolus) 



7. a. Ears more than 25 mm long; distinctive pararhinal 

 glands (large btimps, Fig. 4) on either side of nose — 8 



b. Ears less than 25 mm long; pararhinal glands not 

 distinct — 9 



8. a. Toe hair extending past claws; pelage gray to light 

 gray or white from tip to base — Rafmesque's big-eared 

 bat {Corynorhinus rafinesquii) 



b. Toe hair not extending past claws; pelage pale 

 brown to black with dark base and tips somewhat 

 buff — Townsend's big-eared bat {Corynorhinus 

 townsendii) 



9. a. Total length more than 100 mm, forearm more than 

 40 mm — big brown bat {Eptesicus fuscus) 



b. Total length less than 100 mm, lorearm less than 40 

 mm — 10 



10. a. Tragus (projection within the ear) short, blunt, and 

 curved (Fig. 5a) — 1 1 



b. Tragus long, pointed at tip, and straight (Fig. 5b) — - 

 12 



11. a. Dorsal fur tricolored when parted; coloration black 

 at base, yellowish-brown in the middle and dark 

 brown at tips; forearm pink and less than 32 mm — 

 eastern pipistrelle {Pipistrellus subflavus) 



5 



