Micridium quadridens sp.n.

(Figs. 16, 17, 38, 42, 48, 65, 88a/b, 97)

Habitus Fig. 16. Length 0.56 mm. Colour: brown, pubescence, legs and antennae yellow. Antonnomeres 3–11 length 0.16 mm, 5–7 ovoid, Fig. 42. Width across eyes 0.17 mm. Mentum narrowed towards base, lateral margins straight; submentum with 3 setae, Fig. 38. Pronotum: sides evenly rounded, widest at middle, with two clearly defined elongate depressions reaching from the base to just past the middle and with +/– 5 large punctures between, length 0.14 mm, width 0.21 mm, Fig. 17. Elytra length 0.35 mm, width 0.27 mm. Mesoventrum: keel narrow between mesocoxae, extending on to the metaventrum, Fig. 48. Mesepiventra: reticulation absent, angles rounded, Fig. 48. Metaventrum: metepiventral sutures reaching to posterior margin Fig. 65. Wings of usual ptiliid type.

Male: Posterior intercoxal process of metaventrum with four flattened medial setae Fig. 97. Aedeagus Fig. 88a/ b.

Female: [no spermatheca was found in the dissection of the female]

Etymology. Named after the four prominent setae on the metaventral intercoxal process.

Diagnosis: The distinctive pronotum and form of the male metaventral intercoxal process distinguish this species.

Type data: Holotype: ♂, Bolivia, Cochabamba, BOL / Nov 2013/03. ca 8km E of Villa Tunari, sifting rotten wood, Winkler app. extr., GPS 23 S. 16° 59' 12" E. 65° 20' 47", 298m, 22.xi.2013, P. Baňař lgt.. Mounted on a piece of pinned acrylic as a disassembled slide (UASC) . Paratype: ♀, as holotype (BMNH).