Parasitoides oófagos de Megamelus spp. (Hemiptera: Delphacidae) en la Argentina

Egg parasitoids (Hymenoptera: Eulophidae, Mymaridae, and Platygastridae) of Megamelus spp. (Hemiptera: Delphacidae) in Argentina are reviewed and keyed. Four new species are described: Anagrus (Anagrus) empanadus Triapitsyn, sp. nov. (Mymaridae, parasitoid of M. scutellaris Berg feeding on water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach, Aprostocetus (Ootetrastichus) riverplaticus Triapitsyn, sp. nov. (Eulophidae: Tetrastichinae, parasitoid of M. bellicus Marino de Remes Lenicov & Sosa), A. (Ootetrastichus) yerbamatei Triapitsyn, sp. nov. (parasitoid of M. bellicus , M. scutellaris and Megamelus sp.), all from Buenos Aires Province ( A. (Ootetrastichus ) yerbamatei also occurs in Formosa Province), and Parascelio sabcli Triapitsyn, sp. nov. (Platygastridae: Scelioninae, parasitoid of M. scutellaris in Formosa, the host association is tentative). Other known egg parasitoids of Megamelus spp. in Argentina include Kalopolynema (Kalopolynema) poema Triapitsyn & Berezovskiy (Mymaridae, parasitoid of M. scutellaris in Buenos Aires), and also Cremastobaeus atratus Loiacono & Mulvani (Platygastridae: Scelioninae, parasitoid of M. scutellaris in Formosa, the host association is tentative).