A spittlebug of the genus Aphrophora Germar, 1821 (Hemiptera: Cercopoidea: Aphrophoridae) occurs in profusion on many coastal California populations of invasive exotic iceplant, Carpobrotus edulis (L.) N. E. Brown (Aizoaceae), a spreading, mat-forming, perennial succulent. Described here as Aphrophora moscoviciae sp. nov., it occurs along the Pacific Coast and San Francisco Bay, from Marin County south to at least Ventura County, and achieves remarkably high population levels in some localities, with a maximum density of 2700 nymphs/m², an apparent world record for spittlebugs. While it appears to be endemic to California, native hosts are unknown. It shares habitats with three demonstrated spittlebug vectors of the plant pathogen Xylella fastidiosa Wells et al. (Xanthomonadaceae), including one, Philaenus spumarius (Linnaeus, 1758), that is common on iceplant. This suggests that it could play a role in broader transmission networks among cultivated and wild plants.

The invasive pyrrhocorid bug, Scantius aegytpius (Linnaeus, 1758), was first reported in the United States from California in 2009, and the authors now report its spread to neighboring Arizona for the first time and analyze its distribution within the state. Vouchered physical specimens and photographic records confirm the presence of the species in Maricopa and Yavapai Counties, and photographic records additionally suggest the presence of the species in Coconino County. Notes regarding the biology and seasonality of the species are included, along with discussion on the usefulness of the community science resources iNaturalist and BugGuide for tracking the spread of some newly emergent invasive species.

Dalmatian toadflax, Linaria dalmatica (L.) Mill., and yellow toadflax, Linaria vulgaris Mill. (Plantaginaceae), are exotic forbs that have become widespread in North America, including California. Both species have accumulated several exotic insects from accidental and intentional introductions. Until recently, Mecinus janthiniformis Toševski & Caldara, 2011 was known to occur at only one location in southern California. Recent surveys of L. dalmatica in northern California recovered M. janthiniformis and a second weevil, Rhinusa neta (Germar, 1821), the latter a new California record. From 2010–2015, M. janthiniformis was recovered at 24 of 27 sites in Lassen, Modoc, Plumas, Siskiyou, and Trinity Counties. After 2014, four locations in Trinity County and one in Sierra County were monitored annually through 2020, but no M. janthiniformis have been recovered to date suggesting this species has not extended its range since 2014. In 2018, R. neta was discovered in L. dalmatica seed capsules in Trinity and Sierra Counties. Later surveys found R. neta infesting L. dalmatica at five locations in four counties and Sairocarpus virga (A. Gray) D. A. Sutton (= Antirrhinum virga A. Gray) (Plantaginaceae), a native species, at one location in Colusa County. The intensity of attack of R. neta on L. dalmatica ranged from 9–70% of seed capsules infested. Being found 300 km south of the Oregon border suggests that R. neta spreads more readily than M. janthiniformis, which has only spread 190 km south of the Oregon border but no further since 2014. Repeated annual sampling at uninfested sites found R. neta to have spread 42 km in one year, an unusually high dispersal rate for exotic Coleoptera.

Three new species, Ammoplanus yanegai sp. nov., Timberlakena vitrea sp. nov., and Mohavena woolleyi sp. nov., are described in the Hymenoptera family Ammoplanidae. Also, the unknown female of Parammoplanus penrosei N. Smith, 2012b is described. Updated keys to these genera are included.