Miridiba species

Gao, Chuan-Bu, Bai, Ming, Fang, Hong & Li, Jun, 2021, Miridiba hani Gao, a new species from Hainan, China (Coleoptera: Scarabaeidae Melolonthinae: Rhizotrogini), with a new combination from Vietnam, Zootaxa 4996 (2), pp. 331-342 : 337

Key for identification of Miridiba species known to occur in Hainan Island:

1. Antennae with 9 antennomeres.......................................................................... 2

- Antennae with 10 antennomeres......................................................................... 4

2. Pronotum glabrous. Base of elytra with long pubescence, elytral disc glabrous............. M. frontalis (Fairmaire, 1886)

- Pronotum with dense setae, or long pubescence. Elytra glabrous, or with dense short setae........................... 3

3. Pronotum glabrous, except a tuft of long and brush-shaped pubescence longitudinally ranged on central area. Elytra glabrous................................................................................... M. sus (Moser, 1912)

- Pronotum and elytra with dense short setae..................................... M. kuatunensis Gao & Fang, 2018

4. Body longer than 20.0 mm. Pronotum with sparse punctures............................... M. hani Gao , new species

- Body shorter than 17.3 mm. Pronotum with dense punctures............................... M. sinensis (Hope, 1842)