Geomydoecus (Mallophaga: Trichodectidae) from Pappogeomys and Zygogeomys pocket gophers (Rodentia: Geomyidae) in central Mexico.

Descriptions and illustrations are given for 13 previously described species and subspecies of Geomydoecus and four new subspecies: G. mexicanus Price and Emerson (type host: Pappogeomys merriami saccharalis (Nelson and Goldman], G. perotensis perotensis Price and Emerson (type host: P. m. estor (Merriam], G. p. irolonis Price and Emerson (type host: P. m. irolonis (Nelson and Goldman], G. traubi Price and Emerson (type host: P. m. merriami (Thomas], G. fulvescens Price and Emerson (type host: P. m. fulvescens (Merriam], G. coronadoi coronadoi Barrera, n. status (type host: P. m. estor), G. c. submerriami, n. ssp. (type host: P. m. merriami), G. c. saccharalis, n. ssp. (type host: P. m. saccharalis), G. merriami Price and Emerson (type host: P. tylorhinus planiceps (Merriam], G. veracruzensis Price and Emerson (type host: P. m. fulvescens). G. polydentatus polydentatus Price and Emerson, n. status (type host: P. zinseri (Goldman], G. p. angustirostris, n. ssp. (type host: P. t. angustirostris (Merriam], G. mcgregori Price and Emerson (type host: P. fumosus (Merriam], G. wernecki wernecki Price and Emerson, n. status (type host: P. zinseri), G. w. planiceps, n. ssp. (type host: P. t. planiceps), G. alcorni Price and Emerson (type host: P. alcorni Russell), and G. trichopi Price and Emerson (type host: Zygogeomys trichopus trichopus Merriam).