Geomydoecus thomomyus Complex (Mallophaga: Trichodectidae) from Pocket Gophers of the Thomomys talpoides Complex (Rodentia: Geomyidae) of the United States and Canada

Eight species of Geomydoecus from pocket gophers of the Thomomys talpoides complx are described and illustrated: G. thomomyus (McGregor) from 24 T. talpoides sspp. (type host, T. t. rostralis Hall and Montague); G. craigi n. sp. from T. monticola J. A. Allen and 9 T. talpoides sspp. (type host, T. t. levis Goldman); G. biagiae n. sp. from 8 T. talpoides sspp. (type host, T. t. columbianus V. Bailey); G. betleyae n. sp. from T. monticola, 2 T. mazama Merriam sspp. and 2 T. talpoides sspp. (type host, T. m. mazama); G. thaeleri n. sp. from 11 T. mazama sspp. and 1 T. talpoides ssp. (type host, T. m. glacialis Dalquest and Scheffer); G. dakotensis Price and Emerson from T. t. rufescens Wied-Neuwied; G. fuchsi n. sp. from 5 T. talpoides sspp. (type host, T. t. fuscus Merriam); and G. duchesnensis Price and Emerson from 4 T. talpoides sspp. (type host, T. t. uinta Merriam). A key is provided for the identification of these eight taxa.