We surveyed numbers of The Pan-Pacific Entomologist published from 1924 to 2023 for characteristics of issues, authors, topics, and study sites. We verified continuous publication, with numbers of articles and pages peaking in 1973 and 1981, respectively. Approximately 70% of authors and study sites were from California and the western United States. Insects from the five largest orders made up over 80% of the taxa of emphasis, but almost all insect orders and a wide variety of other invertebrate groups were represented. Taxonomy and natural history composed over 70% of the principal topics, followed by book reviews, faunistic studies, economic entomology, physiology/anatomy, and biography/obituary. Topic diversity increased steadily over time. Numbers of authors from the Neotropical and East Palearctic biogeographic regions increased markedly in the last four decades, as did the numbers of study sites from the Oriental, East Palearctic and Oceanian realms. Some observed changes in the journal's characteristics over its century of publication may reflect local, national, and international trends, such as increased collaboration among researchers, altered scientific opportunities and constraints, heightened awareness of societal and environmental problems, and page charge considerations. Our analysis suggests that the journal has increased its geographic range and currently reflects a broad diversity of international entomological activity. At the same time, by retaining the essential characteristics of a regional entomological publication, it has continued to encourage local research and strengthen personal interactions within the local community. Similar analyses of other long-standing regional entomological journals could prove valuable in interpreting the results presented here.

This paper builds on the history of the first 50 years of the Pacific Coast Entomological Society (as reported by E. O. Essig in 1951). Discussions and summaries of the Society's bylaws, officers, members, meetings, publications, finances, and other items of note from 1952 to 2022 are included, as well as some corrections to the earlier paper.

We record for the first time from the Galapagos Islands the species Eupelmus pulchriceps (Cameron, 1904) as well as the genus Horismenus Walker, 1843 with its species Horismenus dennoi Hansson, Kenyon & Benrey, 2019, all of them Hymenoptera parasitoids of seed beetles in the genus Acanthoscelides Schilsky, 1905.

Registramos por primera vez para las Islas Galapagos la especie Eupelmus pulchriceps (Cameron, 1904) así como el género Horismenus Walker, 1843 con su especie Horismenus dennoi Hansson, Kenyon & Benrey, 2019, todos ellos Hymenoptera parasitoides de escarabajos de las semillas del género Acanthoscelides Schilsky, 1905.

Adota elongata sp. nov. is described on the Korean coast. Adults of the new species were collected under stones on the seashore and are similar to those of Adota koreana Lee & Ahn, 2013. Morphological comparison for these two species is presented. The validity of the new species was also supported on both parsimony and maximum likelihood trees using partial COI and 28S gene sequences. A description and illustrations of diagnostic characters are provided to facilitate identification.

Two new species of the genus Kubaniellus Kalashian, 1997 are described and illustrated, both from China: Kubaniellus kalashiani sp. nov., from Guangdong Province and K. daguishancola sp. nov. from Guangxi Zhuang Autonomous Region.

Two new species of Buprestidae (Coleoptera) are described from southern Mexico: Acmaeodera cuyuteca Westcott sp. nov. from Guerrero and Jalisco; and Acmaeodera pseudostigmata Westcott sp. nov. from Puebla.

Spring-active Arizona specimens identified as Sphaenothecus bilineatus (Gory, 1831) were determined to represent another species, S. cylindricollis (Casey, 1924), which had been a synonym and is herein reinstated as a valid species. A diagnosis of S. cylindricollis is presented with morphological characters photographed, discussed, and compared to S. bilineatus. Specimen label data from institutional and private collections are provided for S. cylindricollis.

A unique second-instar chrysopid specimen is described from the Galápagos Islands. Its external characteristics identify it as a species of Chrysoperla Steinmann, 1964; I tentatively propose that it is the previously unknown larva of the endemic species Chrysoperla galapagoensis (Banks, 1924).