Key to the species of the subfamily Pselaphinae Latreille, 1802 from the Wumenshan National Nature Reserve (males only)

1. Anterior margin of antennal scape with distinct notch at apex; parameres of aedeagus fused to ventral membranous plate, or reduced ........................................................................(Batrisitae: Batrisini) 2

– Anterior margin of antennal scape straight, lacking distinct notch at apex; parameres of aedeagus present, fully developed .......................................... (Goniaceritae: Iniocyphini and Brachyglutini) 7

2. Each elytron with three basal foveae; pronotal lateral margins spinose, or smooth (representing a rare case) .................................................................................................................................................. 3

– Each elytron with two or one basal foveae; pronotal lateral margins smooth, lacking spines ......... 4

3. Antennomere 10 and 11 greatly modified, 10 (Fig. 6D) with large cavity on ventral surface, and 11 (Fig. 6C) with broad basal projection; pronotal lateral margins (Fig. 7B) markedly protruding, with acute marginal spines; mesotibia (Fig. 6F) with distinct apical spine; aedeagus (Fig. 6H–I) stout ... ........................................................................................................... Tribasodites pectoralis sp. nov.

– Antennomere 10 and 11 (Fig. 5C) simple, unmodified; pronotal lateral margins (Fig. 5B) rounded, smooth, lacking marginal spines; mesotibia lacking apical spine; aedeagus (Fig. 5F–G) elongate ... ................................................................................................................ Tribasodites ocellus sp. nov.

4. Dorsal lobe of aedeagus (Fig. 3G–I) strongly twisted at base, recumbent .......................................... .............................................................................................................. Batrisiella ordinaria sp. nov.

– Dorsal lobe of aedeagus erect ........................................................................................................... 5

5. Abdomen modified, with central cavity on posterior half of tergite 1 (IV) (Fig. 4E); aedeagus with relatively small, constricted basal capsule (Fig. 4G–H) ......................... Batrisocenus asper sp. nov.

– Abdomen modified or unmodified, lacking central cavity on posterior half of tergite 1; aedeagus with relatively large, extended basal capsule ............................................................................................ 6

6 Dorsal surface of body (Fig. 1A–B) with scattered long, thick setae; head venter and prosternite unmodified; abdomen (Fig. 1A, D) modified, tergite 1 (IV) densely covered with anteriorly pointed setae ........................................................................................ Arthromelodes punctiventris sp. nov.

– Dorsal surface of body normally setose, lacking long, thick setae (Fig. 2A); head venter (Fig. 2C–D) with small lamellar-like protuberance at middle; prosternite (Fig. 2E) with deep, setose transverse sulcus; abdomen simple, lacking anteriorly pointed setae ..................... Arthromelodes weii sp. nov.

7 Head (Fig. 7A) greatly modified, with broad cavity on vertex; gular region lacking median carina; maxillary palpus short; pronotum (Fig. 7B) with transverse antebasal sulcus ................................... .......................................................................................................... Nipponobythus flamma sp. nov.

– Head (Fig. 8A) lacking modifications; gular region with broad median ridge; maxillary palpus markedly elongate; pronotum (Fig. 8B) lacking transverse antebasal sulcus .................................... .................................................................................................... Triomicrus wumengmontis sp. nov.