The mitochondrial genome of Nigidius miwai Nagel (Coleoptera: Lucanidae), a carnivorous lucanid from South Korea.

The complete mitochondrial genome of carnivorous Nigidius miwai was analyzed prior to a study on evolution of carnivorous pathway within the family. This species' genome had a total length of 18,462 bp (GenBank accession number: OL597607), comprising 36 genes along with 13 protein-coding genes, 21 tRNA genes, two rRNA genes, and an A + T rich region. The nucleotide composition was 37.2% A, 33.8% T, 9.2% G, and 19.8% C (GC contents 29.0%). The phylogenetic tree indicated that N. miwai is a distinctive species within Nigidiini of Lucaninae.

Revision of Korean species of the genus Batriscenellus Jeannel (Staphylinidae, Pselaphinae, Batrisitae) with description of one new species.

The genus Batriscenellus Jeannel, 1958 (type species: Batrisus fragilis Sharp) includes 35 species and is known from South Korea, China, Japan, Russia, and India. Three species, B. vicarius, B. auritus, and B. orientalis have been documented from the Korean Peninsula. One additional species, Batriscenellus koreanus sp. nov., is described as new. Redescriptions of the Korean species, a species key, illustration of habitus, and diagnostic characters are provided.

Revision of the Australian genus Logasa Chandler (Staphylinidae, Pselaphinae, Faronitae) with description of three new species.

The Australian genus Logasa Chandler, 2001 (type species: L. novaeanglia Chandler) is comprised of six species, three of which are described as new: Logasa newtoni sp. nov., Logasa thayerae sp. nov., and Logasa comforti sp. nov. Examination of the types of L. tricolor (Oke) and L. ventralis (Oke) revealed that they do not share some of the diagnostic characters used here to characterize the type, and other species of the genus, but they are retained in Logasa until the group is revised. A key to species, illustrations of their habitus, and diagnostic characters are provided.