Stem fauna of the native sunflower species,Helianthus annuusL.,H. petiolarisssp.petiolarisNuttall,H. maxmilianiSchrader, andH. rigidusssp.subrhomboideus(Rydberg) Heiser, which occur in western North Dakota are reported. Species of insects recovered in order of relative abundance were:Cylindrocopturus adspersus(LeConte) (Coleoptera: Curculionidae),Mordellistenasp. (Coleoptera: Mordellidae),Suleima helianthana(Riley) (Lepidoptera: Tortricidae),Isophrictis similiella(Chambers) (Lepidoptera: Gelechiidae), andDectes sayiDillon and Dillon (Coleoptera: Cerambycidae). A single species of parasitoid,Nealiolus curculionis(Fitch) (Hymenoptera: Braconidae), was reared fromC. adspersuslarvae.