Hairs on abdomen not white-tipped; Pacific and southern states 



Corynorhinus rafinesquu (Lesson) Rafinesque's Lump-nosed 



Bat 

 (Plecotus rafinesquii (Lesson) ) 



5. Without conspicuous white spots; tail projecting well beyond the wing 



membrane; total length slightly over six inches; southwestern states; 

 Family Molossidae (part) 



Eumops perotis californicus (Merriam) Bonneted Bat 

 With a conspicuous white spot on each shoulder and on the rump; tail 

 not as above; total length slightly over four inches; southwestern states; 

 rare 



Euderma maculata (Allen) Spotted Bat 

 (of Family Vespertilwmdae) 



6. With a stout, mouse-like tail projecting about an inch beyond the wing 



membrane; w'ings very narrow; Family Molossidae (part) Free-tailed 



Bats 7. 



Tail not so; wings not very narrow; Family Vespertilionidae (part) 9. 



7. With a prominent swelling between the eye and the nostril; recorded for 



states west of the Mississippi 



Tadarida macrotis (Gray) Large Free-tailed Bat 

 (Tadarida depressa (Ward) ) 

 Not so 8. 



8. In the southeastern states, probably to Louisiana 



Tadanda cynocephala (Le Conte) Le Conte's Free-tailed Bat 

 In the southwestern states, Texas and Colorado westward; not differing 

 externally from the above 



Tadarida mexicana (Saussure) Mexican Free-tailed Bat 

 {Molossus mexicanus Saussure) 

 (J^lyctinomus nasutus Allen) 



9. Each nostril almost surrounded by a conspicuous high ridge; ears, when 



laid forward, extending considerably beyond the end of the snout; with 

 four lower incisors; total length about four inches; western states 

 Antrozous pallidus (Le Conte) Pale Bat 

 Not with the preceding combination of characters; with six lower incisors; 

 widely distributed 10. 



10. Wings narrow; third finger definitely longer than fifth, and phalanges of 



fifth digit of equal length; with four mammae 1 1. 



Wings wider; third finger usually only slightly longer than fifth, and 



phalanges of fifth finger not of equal length; with two mammae 13. 



11. Large, often reaching six inches in total length; interfemoral membrane 



(between hind legs and tail) furred only half way down; color light 

 yellowish-brown; southern states, westward to Texas 

 Dasypterus j\oridanus Miller Yellow Bat 

 (Dasypterus intermedms (Allen) ) 

 Smaller; adults four to five and one-half inches; if large, hair grayish at 

 base, silvery at tips; interfemoral membrane furred nearly to the edge; 

 generally distributed 12. 



483 



