New records of parasitoid flies (Diptera, Sarcophagidae) in Nearctic species of Trimerotropis Stål (Orthoptera, Acrididae, Oedipodinae, Trimerotropini)

The genus Trimerotropis Stål, 1873 (Orthoptera: Acrididae) is a speciose group of American grasshoppers, comprising 49 recognized species. Despite its diversity, published records of parasitoid associations with Trimerotropis are scarce, with only a single published record of a sarcophagid fly, Blaesoxipha (Acridiophaga) caridei (Brèthes, 1906) (Diptera: Sarcophagidae), from T. ochraceipennis (Blanchard, 1851) in Chile. Here, we report two new hosts for B. (A.) angustifrons (Aldrich, 1916): T. melanoptera McNeill, 1901, in New Mexico, USA, and T. pallidipennis (Burmeister, 1838), in California, USA. The records are described herein, including illustrations and diagnostic characters of both hosts and their parasitoid fly. These findings significantly expand the known host range for this Nearctic parasitoid and contribute to the limited understanding of host–parasitoid dynamics in this ecologically important genus of grasshoppers.