Chrysopsis gossypina (Michx.) Elliott subsp. hyssopifolia (Nutt.) Semple (Asteraceae) (Benjamin 1934, as Heterotheca trichophylla (Nutt.) Shinners); Chrysopsis (Nutt.) Ell. spp.(see below); stem galls (reared).

We have found galls of this species in C . linearifolia Semple, C. scabrella Torr. & Grey, and C. gossypina (and/or gossypina x scabrella?). Adults of P. quadrifasciata have also been collected in association with other species of Chrysopsis in Florida.

HOST. - The larvae feed in Chrysopsis trichophylla, in irregularly shaped galls, usually on the stems, but sometimes at the bases of the flowers, or on the tender growth from the root crowns. The galls are usually compound, and may contain from 1 to 8 separate cells with a single larva or puparium in each. The larva before forming a puparium makes an exit place in the gall, only a thin and easily ruptured covering sealing the emergence hole.