A new species and additional records of Lobrathium Mulsant & Rey (Coleoptera, Staphylinidae, Paederinae) from China

Abstract Lobrathium fuscoguttatum sp. n. (type locality: Guangxi) is described and illustrated. The latest key to the Lobrathium species of mainland China is modified to include the new species. Additional data are provided for six previously described species.


Introduction
According to a recent checklist provided by Assing (2012), 43 species of the genus Lobrathium Mulsant & Rey, 1878 were reported from China. Later, 13 additional species were described from mainland China (Assing 2013;, thus raising the total number of species known from China to 56. In this paper we report a new species of Lobrathium (Guangxi), and additional locality data for six previously described species. Illustrations of the previously described species listed below are provided by Assing (2012),  and .

Material and methods
The material treated in this study is deposited in the Insect Collection of Shanghai Normal University, Shanghai, China (SNUC).
Type labels are cited in their original spelling. A slash (/) is used to separate different labels. Type material bears the following type label: 'HOLOTYPE [red]  The specimens were killed with ethyl acetate and then dried. Materials were stored in 75% ethanol; genitalia and small parts were embedded in Euparal on plastic slides that were attached to the same pin with the specimens.
Morphological studies were carried out using an Olympus SZX 16 stereoscope. A digital camera Canon EOS 7D with MP-E 65 mm Macro Photo Lens was used for the habitus photos. An Olympus CX31 microscope and a Canon G9 digital camera were used for the photos of small structures.
The measurements of various body parts are abbreviated as follows: BL -length of the body from the labral anterior margin to the anal end; HL -length of the head from the anterior margin of the frons to the posterior margin of the head; HW -maximum width of the head; PL -length of the pronotum along the midline; PW -maximum width of the pronotum; EL -length of the elytra from the anterior margin to the elytral posterior margin along the suture; EW -maximum width of the elytra; AL -length of the aedeagus from the apex of the ventral process to the base of the aedeagal capsule.  Description. Body length 6.75-7.51 mm, length of fore body 3.45-3.89 mm. Habitus as in Fig. 1A. Coloration: body black with bluish hue, middle of elytra with yellowish spot not reaching lateral and posterior margins; legs blackish with paler tarsi, antennae dark brownish to blackish.
Head weakly transverse (HW/HL = 1.06-1.18), widest across eyes; posterior angles broadly rounded; punctation dense and moderately coarse, sparser in median dorsal portion; interstices without microsculpture. Eyes large, more than half as long as distance from posterior margin of eye to neck in dorsal view. Antenna 2.0-2.17 mm long.
Pronotum 1.19-1.27 times as long as broad, nearly as wide as head (PW/HW = 0.91-1.0), lateral margins convex in dorsal view, punctation similar to that of head, but with impunctate midline, interstices glossy.
Abdomen broader than elytra; punctation fine and dense; posterior margin of tergite VII with palisade fringe.
Male. Sternite VII (Fig. 1D) strongly transverse and with distinct median impression, this impression without pubescence, posterior margin with distinct median concavity; sternite VIII ( Fig. 1E) weakly transverse, with long and pronounced posteromedian impression, this impression with a few modified, stout and short black setae (10-20 on either side of middle), posterior excision rather narrow and moderately deep, on either side of this excision with a cluster of long dark setae; aedeagus (Figs 1B, C) 0.82-0.87 mm long, ventral process long, curved, and apically acute in lateral view.
Female. Sternite VIII (Fig. 1G)   Comment. This species has been recorded from Hubei, Shanxi, Zhejiang, Sichuan, Yunnan and Shaanxi (Assing 2012;. The above male from Jiangxi represents a new province record. Comment. The specimens from Liping N. R., Hanzhong City, Shaanxi, were sifted from leaf litter near a stream after rain.