264 VERTEBRATE ANIMALS OF THE UNITED STATES 



Antrozous H. Allen. Dentition 1/2, i/i, 1/2, 2,/yi mammae 2: 2 

 species, i in Lower California. 



A. pallidus (LeConte). Body pale drab in color; length 105 mm.; 

 tail 45 mm.; forearm 53 mm.; ears very large, extending 20 mm. 

 beyond the nose when laid forwards: southwestern States from western 

 Texas to the Pacific. 



Family 3. Molossidae. — Wings long and narrow, thick and 

 leathery; no tragus; legs short and stout; nostrils usually on a special 

 pad: about 80 species, in the warmer parts of 

 the earth. 



Tadarida (LeConte). Head and body flat- 

 tened; dentition 1/2 or 1/3, i/i, 2/2, 3/3; ears 

 large, rounded, extending beyond the snout when 

 Fig. 155.— Head of ^^^^ forwards, nearly united on the top of the 

 Tadarida cynocephaia (from head: 40 specics, 16 American, 2 in the United 



Allen). 



States. 



T. cynocephala (LeConte). Mexican bat (Fig. 155). Body plumbe- 

 ous or dusky brown in color; length ico mm.; tail 30 mm.; forearm 

 40 mm.; sides of snout with a series of deep wrinkles; half of tail in 

 interfemoral membrane: southern States; common. 



Order 6. Carnivora. — The flesh-eaters. Carnivorous, sometimes 

 omnivorous mammals with large projecting canine teeth, cutting pre- 

 molars and tuberculate molars; the last upper premolar and the first 

 lower molar being carnassial (flesh-cutting) teeth (Fig. 139); digits 

 unguiculate and never less than 4: 250 species, 120 in the United States, 

 grouped in 5 families; predatory mammals distributed throughout the 

 world. 



Key to the Families of Carnivora 



ai Claws not retractile. 



bi Tail rudimentary; bears •. i. Ursidte. 



bo Tail well developed and long. 



Ci Feet digitigrade; hind foot with 4 toes; wolves; foxes. . . .2. Canidce. 

 C2 Feet plantigrade; hind foot with 5 toes. 



di Toes not webbed; raccoons 3. ProcyonidcB. 



d2 Toes webbed; cacomistles 4. Bassariscidce. 



a2 Claws more or less retractile. 



bi Hind foot with 5 toes; weasels; skunks 5. Musielidce. 



bo Hind foot with 4 toes; cats 6. Felidcc. 



Family i. Ursidae. — Bears. Body of large size, thick and heavy; 

 feet plantigrade; toes 5-5; claws not retractile: in all geographical 



