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The complete mitochondrial genome of Aleochara postica Walker, 1858 was determined in this study. It is 15,473 bps in length, containing 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and a 778 bp A + T-rich control region. Most PCGs use the conventional ATN start codon, except for cox1 and nad1. Two genes (cox1 and cox3) use single T residue as stop codon rather than the routinely used TAA or TAG. All tRNAs, except for TrnS1, exhibit the cloverleaf secondary structure. ML phylogenetic analysis using 13 PCGs of 52 beetle species indicated that A. postica was clustered with other members of the subfamily Aleocharinae as conventional taxonomy predicted.

The complete mitogenome of rove beetle Megalinus hunanensis Bordoni, 2013 was determined in this study. It was 17,314 bp in length, and comprised of 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and a 2511 bp A + T-rich control region. Most PCGs used the typical ATN start codon, except for nad1. Five genes (cox1, cox2, cox3, nad4, and nad5) used a single T residue as stop codon rather than the commonly used TAA or TAG. All tRNAs could be folded into the cloverleaf secondary structure. Bayesian inference phylogenetic trees built on 13 PCGs and their translated amino acid sequences from 29 rove beetle taxa showed that Staphylininae was paraphyletic with respect to Paederinae; M. hunanensis was a member of the tribe Xantholinini.

Two new species of the genus Pseudolathra Casey, 1905 from mainland China are reported in this paper, namely Pseudolathra gansuensis Li & Zhou, sp. nov. and P. assingi Li & Zhou, sp. nov. This genus is reported for the first time from Gansu Province, Northwest China. Both species are described in detail and supplemented with color plates of normal light photos of the habitus, sternites VII-IX and details of aedeagal structures in different views. [ABSTRACT FROM AUTHOR]

A male of the very rare and phylogenetically puzzling species, Quelaestrygon puetzi Smetana, 1999, is described for the first time based on a single specimen from Sichuan Province, China. High quality color images and line drawings of the male external and genitalic traits are provided. [ABSTRACT FROM AUTHOR]