Two species of Acanthocephalini are described, Ichilocoris carpinteroi Brailovsky, new species from Argentina and Salapia morenoi Brailovsky, new species from Peru. Color dorsal habitus images of each species are included. A key to the species of Ichilocoris is given.

Host and distribution records are reviewed for the leaf-mining fruit flies (Diptera: Tephritidae: Trypetina) occurring in Canada and the USA, with new data from rearings and from observations posted to BugGuide and iNaturalist. Nine species are known, including the European species Acidia cognata (Wiedemann), which has recently been discovered in eastern Canada mining leaves of coltsfoot (Asteraceae: Tussilago farfara L.); three species of Euleia Walker, of which the two with known hosts feed on Apiaceae; and five species of Trypeta Meigen, of which the three with known hosts feed on Asteraceae (mostly Senecioneae). Newly reported hosts for the widespread species Euleia fratria (Loew) include Aegopodium podagraria L., Angelica arguta Nutt., A. hendersonii J. M. Coult. and Rose, A. sylvestris L., A. tomentosa S. Watson, A. triquinata Michx., Apium graveolens L., Cicuta douglasii (DC.) J. M. Coult. and Rose, Daucus carota L., Heracleum sphondylium L., Levisticum officinale W. D. J. Koch, Ligusticum canadense (L.) Britton, Oxypolis rigidior (L.) Raf., Sium suave Walter, Taenidia integerrima (L.) Drude, Thaspium barbinode (Michx.) Nutt., and Zizia aurea (L.) W. D. J. Koch. The first rearing records are given for E. uncinata (Coquillett), which is restricted to Alaska and adjacent Canada; they include Angelica lucida L., C. douglasii, and Heracleum maximum W. Bartram. Packera paupercula (Michx.) Á. Löve and D. Löve, Petasites frigidus var. sagittatus (Pursh) Chern. and R. J. Bayer, Senecio eremophilus Richardson, Rudbeckia laciniata L., and tentatively S. minimus Poir., are newly reported as hosts of the widespread species Trypeta flaveola Coquillett, and S. atratus Greene is a new rearing record for the western T. footei Han and Norrbom. Parasitoids reared from larvae and puparia of these flies include Braconidae (Alysiinae, Opiinae), Eulophidae (Entedoninae, Eulophinae, Tetrastichinae), and Pteromalidae (Miscogastrinae).

Four assemblages of Leiodidae were studied by sampling with carrion-baited traps, from August 2019 to July 2020, in four types of vegetation (sub-deciduous forest, cloud forest, oak forest, and pine forest) in the Haravéri Botanical Garden, San Sebastián del Oeste, Jalisco, México. A total of 1196 cholevine and one leiodine leiodids were collected. Dissochaetus was the most abundant and diverse genus with 1159 specimens representing six species. Dissochaetus sp. 1 was the most abundant species, with 360 individuals. Additionally, 36 specimens of Adelopsis and one specimen of Liocyrtusa were collected. Species seasonal activity differs by vegetation type. Winter was the season with the highest abundance. Of the four types of vegetation, cloud forest had the most diverse and abundant cholevine fauna, while pine forest had the least abundance. An additional three species of Dissochaetus were found, but not determined to species.

Xyris spp., commonly known as yellow-eyed grasses, do not possess nectaries and were thought not to attract many insect visitors. The majority of insect visitation studies carried out on this genus have been limited to North American species, despite its center of diversity being in South America. The discovery of a potential new fungal mimicry system on Xyris spp. and the potential for insect visitation pattern alteration by the fungus led us to assess arthropod visitation to Xyris spp. in three regions of Guyana. Arthropods were photographed and identified morphologically. Here, we provide the first documentation of arthropods in the orders Araneae, Coleoptera, and Orthoptera visiting Xyris spp. plants. We also observed a Coleophora sp. (Lepidoptera: Coleophoridae) on Xyris spikes, expanding the geographic range of this taxon.

The lace bug Dictyla labeculata (Uhler) was described in 1893 from the dry desert of southeastern California's Argus Mountains based on specimens taken on singleleaf pinyon (Pinus monophylla Torr. and Frém.). Subsequent records of this seldom-collected species have been mostly from arid regions of western North America (British Columbia south to Arizona and New Mexico), except for a biogeographically incongruous record from Quebec, Canada. Nebraska is a new state record and the easternmost in the United States based on nymphs and adults found on reproductive structures of James's cryptantha (Cryptantha cinerea [Greene] Cronquist var. jamesii [Torr.] Cronquist) in the Sandhills (June and July, 2020–2022). Idaho is a new state record based on a specimen in the U.S. National Museum of Natural History. The Nebraska study provides the first host plant record for the lace bug. Collections of adults from other plants, such as singleleaf pinyon, are considered incidental or overwintering occurrences. A search for details of the lace bug's collection in Quebec, published without comment in a list of Tingidae from the province, revealed that neither a misidentification nor mislabeling was involved and that the record, albeit anomalous, probably is valid. Because P. R. Uhler did not mention certain details in describing the new species, the collector's name (Albert Koebele) and collection site within the Argus Range (Maturango Spring) are provided. Insect collecting as part of the Death Valley Expedition of 1893 to the western states, during which the lace bug and numerous other new species were discovered, is noted.