The Kenneth Hayward collection housed at the Instituto Miguel Lillo (IMLA) and at Estación Experimental Agroindustrial "Obispo Colombres" (EEAOC) both in Tucumán, Argentina, was studied. Four Dactylopiidae and 32 Diaspididae species with their host plants are listed. Duplaspidiotus koehleri Lizer y Trelles and Pallulaspis lantanae Green & Laing, are redescribed and illustrated; the two species were originally described from Argentina. The genus Rugaspidiotus Mc Gillivary is recorded for the first time from Argentina.
Duplaspidiotus koehleri; Neotropical; Pallulaspis lantana; Rugaspidiotus; Scale Insects
