Two new apterous species of Lathrobium Gravenhorst (Coleoptera, Staphylinidae, Paederinae) from Fujian, East China

Abstract Two new apterous species of the genus Lathrobium Gravenhorst, 1802 from Fujian Province, East China, Lathrobium daocongchaoi Peng & Li, sp. n. and Lathrobium fujianense Peng & Li,sp. n., are described and illustrated.


Introduction
So far, 62 species of the genus Lathrobium Gravenhorst, 1802 have been reported from China (Peng et al. 2012c), but none was previously known from Fujian Province, East China. Only eleven species have been reported from the adjacent Zhejiang Province Luo 1992, 1999a, b;Peng et al. 2012a, b).
Recently, the first author and his colleagues made two collecting trips to Fujian Province and collected a small series of Lathrobium. The examination of the specimens revealed two species, both of which are remarkably different from the previously known species from China regarding their male sexual characters.

Material and methods
All specimens were collected from the leaf litter in broad-leaved forests by sifting. The following abbreviations are used in the text, with all measurements in millimeters:

BL
length of body from the anterior margin of the labrum to the apex of the abdomen; FL length of forebody from the anterior margin of the clypeus to the posterior margin of the elytra; HL length of head from the anterior margin of the clypeus to the posterior margin of the head; HW maximum width of head; PL length of pronotum along midline; PW maximum width of pronotum; EL length of elytra from the apex of the scutellum to the posterior margin of the elytra.
The type material is deposited in the Insect Collection of Shanghai Normal University, Shanghai, China. (SNUC). Habitus as in Fig. 1A. Body brown with paler apex, legs light brown, antennae light brown to yellowish brown.
Elytra with punctation denser than that of pronotum and well defined; hind wings reduced.
Distribution. East China: Fujian. Etymology. The species is named after Cong-Chao Dai, collector of the type specimens.
Remarks. The new species resembles L. zhaotiexiongi Peng & Li, 2012 in having a postero-median impression on the male sternite VI and similarly shaped male sternite IX. The new species can be readily separated by the presence of a median impression on the male sternite VII and by the short ventral process of the aedeagus. In L. zhaotiexiongi, the male sternite VII lacks a median impression and has an asymmetric posterior emargination , and the ventral process of the aedeagus is longer. Female. Posterior margin of tergite VIII (Fig. 3B) broadly convex; sternite VIII ( Fig.  3D) longer than that of male, middle of apical margin with obtuse projection; tergite X ( Fig. 3F) broadly convex apically and not reaching anterior margin of tergite IX (Fig. 3F).

Lathrobium fujianense
Distribution. East China: Fujian. Etymology. The specific epithet is derived from Fujian Province, where the type locality is situated.
Remarks. The new species can be separated from other East Chinese Lathrobium species by the morphology of the aedeagus, as well as by the presence of point-like setae at the posterior margin of the male sternite V and by the presence of short dark setae in the narrow postero-median impression of the male sternite VIII.