Key to Mystrothrips species

[* based on description]

1. Prosternal basantra well-developed (Fig. 8); antennal segment IV with 4 sense cones; antennal segments I–IV with one or more capitate setae.................................................................................. clavatoris

-. Prosternal basantra weak or absent (Figs 2, 11); antennal segment IV with 3 sense cones; antennal segments I–IV with apical setae all acute........................................................................................ 2

2. Antennal segment III with 3 sense cones................................................................... 3

-. Antennal segment III with 2 or 0 sense cones................................................................ 4

3. Postocellar setae with apices broadly expanded (Fig. 16)................................................. dilatus

-. Postocellar setae finely acute............................................................ dammermanni group

4. Antennal segment III with 0 sense cones; compound eye with 3 facets (Fig. 22); maxillary stylets about 0.3 of head with apart; inner apex of fore tarsus with minute recurved tooth in both sexes.................................... nomadus sp.n.

-. Antennal segment III with 2 sense cones; compound eye of microptera with at least 7 facets (Fig. 1); maxillary stylets about 0.5 of head width apart; female without, male with or without fore tarsal tooth..................................... 5

5. Head smooth medially, without strong reticulate sculpture (Fig. 28).......................................... levis *

-. Head with well-developed reticulate sculpture............................................................... 6

6. Maxillary stylets scarcely retracted anterior to occipital ridge (Fig. 1); meso and metanotal reticulate lines with many small tubercles (Fig. 4); male without fore tarsal tooth................................................ brachystylis sp.n.

-. Maxillary stylets retracted almost to postocular setae; meso and metanotal reticulate sculpture lines smooth (Figs 20, 21); male with small fore tarsal tooth....................................................................... reteanum