Dianous luteoguttatus, Champion, 1919

Key to the Dianous luteoguttatus View in CoL complex

1 Elytra without orange spots, metatarsomere I distinctly longer than the following three tarsomeres combined. ................................................................................ 2

– Elytra with orange spots, metatarsomere I distinctly shorter than the following three tarsomeres combined. ................................................................ 3

2 Punctation of interocular area dense, elytra longer with EL/EW=1.22–1.24. BL: 7.5–7.9 mm. Habitus: Fig. 5 View Figs 1–6 ; sexual characters: Figs 15–17 View Figs 15–22 . China ( Yunnan). ........ ..................................... D. vorticipennis Puthz, 2005 View in CoL

– Punctation of interocular area sparse, elytra shorter with EL/EW=1.09–1.15. BL: 6.3–6.6 mm. Habitus: Fig. 6 View Figs 1–6 ; sexual characters: Figs 18–22 View Figs 15–22 . China ( Sichuan, Yunnan). .................................... D. lilizheni View in CoL sp. nov.

3 Femora bicolored. BL: 6.1–7.2 mm. Habitus: Fig. 2 View Figs 1–6 ; sexual characters: Figs 7–9 View Figs 7–14 . China ( Yunnan, Xizang), Myanmar. .................. D. cruentatus L. Benick, 1942 View in CoL

– Femora uniformly black. ......................................... 4

4 Smaller species with BL: 5.3–6.1 mm, median portion of interocular area with interstices about as wide as diameter of punctures, punctation of elytra less confluent. Habitus: Fig. 4 View Figs 1–6 ; sexual characters: Figs 11–14 View Figs 7–14 . China ( Guangxi, Fujian), Vietnam. ................ ..................................... D. depressifrons Puthz, 2016 View in CoL

– Larger species with BL: 6.0– 7.2 mm, median portion of interocular area with interstices distinctly narrower than half the diameter of punctures, punctation of elytra more confluent. .............................................. 5

5 Body with plumbeous luster, pronotal punctation less confluent, elytral spots smaller. BL: 6.0– 7.2 mm. Habitus: Fig. 1 View Figs 1–6 ; sexual characters: Figs. 87, 90 in PUTHZ (2000), Fig. 1 View Figs 1–6 in PUTHZ (1980). China ( Taiwan), India, Nepal, Vietnam. ................................................ .............................. D. luteoguttatus Champion, 1919 View in CoL

– Body without plumbeous luster, pronotal punctation more confluent, elytral spots larger. BL: 6.0–7.0 mm. Habitus: Fig. 3 View Figs 1–6 ; sexual characters: Fig. 10 View Figs 7–14 ; see also Figs. 3, 6 View Figs 1–6 in PUTHZ (2005). China ( Yunnan). .............. ..................................... D. rimosipennis Puthz, 2005 View in CoL