Epiphloeinae Kuwert, 1893, (nomen protectum) is preserved over Ichneinae Spinola, 1841 (nomen oblitum). The correct name of the type genus of Epiphloeinae is Epiphloeus Spinola, 1841.

Ereboporus naturaconservatus Miller, Gibson and Alarie, new genus and new species (Coleoptera: Dytiscidae) is described from specimens collected from Caroline Springs, Independence Creek, Terrel County, Texas, U.S.A. Specimens were collected using drift nets placed at the head of the spring, suggesting the species is subterranean and occurs in nearby areas of the Edwards-Trinity Aquifer. In addition, the new taxon is characteristic of subterranean diving beetles in having adults depigmented, relatively soft, and lacking metathoracic wings and compound eyes. In addition, the taxon is diagnosed among all adult Dytiscidae in having: 1) the head extremely large relative to the rest of the body, 2) the pronotum short and cordate; 3) the prosternal process small, short and not extending to the mesosternum; 4) the elytra fused along the suture; 5) the elytron and elytral epipleuron extending ventromedially, concealing large lateral portions of the abdominal sterna; 6) the female internal genitalia with a large, elongate, ring-shaped structure on the bursa. The species is placed in the tribe Hydroporini (Hydroporinae) based on the character states: 1) pro- and mesotarsi pseudotetramerous; 2) male genitalia bilaterally symmetrical; 3) scutellum not visible with the elytra closed; 4) prosternum in lateral aspect declivous; 5) metatarsal claws the same length; 6) apices of elytra evenly rounded; 7) metepisternum extending to mesocoxal cavity externally; 8) male lateral lobe with one segment; 9) metacoxal process with well-developed lobes; 10) anterior margin of metafemur distinctly separated from the lobes of the metacoxal process. Three additional subterranean species are known from North America, Comaldessus stygius Spangler and Barr, 1995, Stygoporus oregonensis Larson and Labonte, 1994, and Haideoporus texanus Young and Longley, 1976. Each of these species is figured and discussed.

We conducted a detailed study of the internal genitalic characters of males and females of Copris klugi klugi Harold and Copris klugi sierrensis Matthews. On the basis of the adopted taxonomic criteria and on the comparison of eight species included in the fricator group, we maintain that C. klugi Harold and C. sierrensis Matthews are distinct species rather than subspecies. At the same time, although with only preliminary results, we also emphasize the heterogeneity of some species complexes that were established by Matthews and are recognized in the literature, and underline the need for a group revision using genitalia as a source of taxonomic data. In addition to the taxonomic analysis, we also included an introductory revision of the geographic distribution of the two studied taxa and their related species.

A new species from Guatemala, Xyloryctes guatemalensis Bitar and Delgado, collected in the Departments of Guatemala and Sacatepéquez is described. The new species is diagnosed and its distinctive structures are illustrated. A new key to the species of Xyloryctes is provided.

Adults of Carabus (Apotomopterus) prodigus Erichson were collected and larvae were reared in the laboratory. The morphology and chaetotaxy of the larva are described and illustrated for the first time. The phylogenetic position of Apotomopterus within Carabus is discussed based on larval character states. From similarities of the adnasale and urogomphus in the first instars of Apotomopterus and Calosoma Weber, it is concluded that Apotomopterus is a basal or primitive clade in the genus Carabus.