Perognathus merriami J. A. Allen, 1892 . Bull. Am. Mus. Nat. Hist., 4:45.

TYPE LOCALITY: USA, Texas, Cameron Co., Brownsville .

DISTRIBUTION: SE New Mexico east to S Texas (USA), east from N Chihuahua to Tamaulipas (Mexico).

SYNONYMS: gilvus Osgood, mearnsi J. A. Allen.

COMMENTS: Synonymized with flavus by Wilson (1973), but Lee and Engstrom (1991) considered merriami a separate species based on biochemical genetics.