Littoral species of Cercyon Leach occurring on coastlines of the West Coast of North America from Alaska to Mexico are reviewed based on material freshly collected in Washington State (USA) and British Columbia (Canada) and on museum specimens including primary types. Five species are recognized, including two that are distributed on both American and Eurasian sides of the Pacific Ocean and three that exist only on the American West Coast. The eastern Palearctic Cercyon dux Sharp is recorded in North America for the first time, with all known specimens collected after 2014. The synonymy of the western Nearctic Cercyon tolfino Hatch with the eastern Palearctic Cercyon setulosus Sharp is confirmed. The previous concept of Cercyon fimbriatus Mannerheim, the most common and widespread species, is confirmed. Cercyon spathifer Smetana is placed in junior synonymy with Cercyon luniger Mannerheim, and the species previously treated as C. luniger is an unnamed species, described herein as Cercyon whuljensis Suzumura, new species. Redescriptions of all five species are given along with SEM photographs, illustrations, and maps based on examined material and literature data, and a key to species is provided.

Crepidodera haydenae Clark and Veal, new species, is described and illustrated. So far, this species is known only from Hayden Prairie in Iowa, USA. The adult host is probably prairie willow, Salix humilis Marsh.

Egg hatch and the first instar of Semijulistus spectabilis (Lewis) are described in detail for the first time, and their growth process is compared with that of the melyrid lineage. Diversification of the ontogenic development of the melyrid lineage is discussed.

An updated checklist of the Dermestidae for mainland Spain and the Balearic Islands is produced. A total of 102 species was found from existing lists and world catalogues, but no supporting scientific literature could be found for 26 of these species. Consequently, the proposal here is that the checklist of Dermestidae for Spain should number 76. A consideration of the types of species that should constitute a national checklist and how species appear on a checklist without scientific support is made.

New distribution records for the genus Ora Clark, 1865 in the USA and Mesoamerica are given, with notes on variations in markings in Ora discoidea Champion, 1897. New country records are provided for Ora depressa (Fabricius, 1801) (Mexico) and O. discoidea (USA). A key is provided for identification of the Ora species known from the USA.

A new species of Bolbochromus Boucomont, 1909, Bolbochromus tricostatus Selking, new species, is described from Mindanao, Philippines. The new species is illustrated and compared to similar congeneric species.

Onthophagus howdeni Zunino and Halffter was originally described from two male specimens collected in Oaxaca, Mexico. Thirty years later, this species is collected again in the Sierra Norte of Oaxaca, the previously unknown female is described, and information about its biology is given. Onthophagus zapotecus Zunino and Halffter was originally described based on three specimens. A redescription of this species is based on newly collected specimens. New data are provided on the distribution of Onthophagus howdenorum Zunino and Halffter, Onthophagus oaxacanus Zunino and Halffter, Onthophagus aureofuscus Bates, and O. zapotecus. The International Union of Conservation of Nature's status of O. aureofuscus and Onthophagus undulans Bates are examined. The affinities with other species of the species- group are discussed, and information about their biology and capture method is presented. An identification key is given, in English and Spanish, for the species of Onthophagus Latreille recorded in Sierra Norte and Sierra Sur of Oaxaca.

Two species of flightless Cymatodera Gray are described from the California Channel Islands: Cymatodera insularis Rifkind, new species, from Santa Catalina Island and San Clemente Island; and Cymatodera caterinoi Rifkind and Burke, new species, from Santa Rosa Island, Santa Cruz Island, and Anacapa Island. The new species are compared with Cymatodera vandykei Schaeffer and Cymatodera angustata Spinola, similar flightless species from the California mainland. The origins of Channel Island insect endemism are briefly discussed.

The primary types of beetles (Coleoptera) in the C. A. Triplehorn Insect Collection at The Ohio State University are catalogued. Data on original combinations, current combinations, and type locality are verified and presented. A brief history of the collection is recounted. There are 200 primary types (172 holotypes, seven neotypes, one lectotype, 20 syntypes) from 28 families and eight countries in the collection. A total of 24 specimens labeled by others as primary types were confirmed as manuscript names and are presented in a separate list. The primary type of Luperaltica nitida Wilcox is presumed to be lost. The presumed holotype of Edrotes fossor Triplehorn was previously erroneously labeled, and a lectotype is designated from the paratype series.

The genus Lithocharodes was described by David Sharp in 1876 for a single species, Lithocharodes fuscipennis Sharp, from the Amazon, Brazil. For over 130 years, the species has been mentioned only in catalogs. However, recent fieldwork found it in localities ranging from northern to southern Brazil. Lithocharodes fuscipennis differs from the other species of the genus mainly by the dark brown to black elytra with the apical