The plant bug genus Izyacapsus Henry (Miridae: Orthotylinae: Ceratocapsini) is reviewed and three new species are described: I. argentinus new species from Mendoza Province, Argentina; I. boliviensis new species from Santa Cruz Department, Bolivia; and I. woodruffi new species from several provinces in the Dominican Republic. Digital images of the adults and male genitalia of each species are provided, I. kerzhneri Henry and I. rubrocuneatus Henry are diagnosed, and a revised key to the species of the genus is given to aid identification.