Two new species of the iguanid genus <i>Ctenoblepharis, C. donoso barrosi</i> and <i>C. rabinoi</i>, are described, on the basis of adult specimens collected from the arid lands of the southeastern Mendoza province, Argentina. General notes on the geographical distribution and ecological features of the genus are included.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Museo