Reproduction by captive Dipodomys has been so rare that each instance is still worthy of note. Eleven or more litters of Dipodomys ordi pallidus have been obtained in the laboratory of the Ecological Research Unit, University of Utah (Day et al., Science, 124: 485–86, 1956), and Bailey (N. Amer. Fauna No. 53: 254, 1931) reared one litter of D. spectabilis spectabilis. The present note is the third record of reproduction by captive Dipodomys, and the first for D. merriami merriami.