Key to Iridothrips species (females)

[* based on description]

1. Pronotum with 2 pairs of posteromarginal setae (Fig. 8); postocular setal pair I and pair II usually absent.................................................................................................... zizaniophila comb. n.

-. Pronotum with 4–5 pairs of posteromarginal setae (Fig. 13); postocular setal pair I and pair II usually present, occasionally pair I missing............................................................................................ 2

2. Ocellar setae I absent, cheeks convergent posteriorly (Fig. 5) [abdominal tergites posterior margin with short irregular dentiform lobes laterally, tergite VIII with complete comb (Fig. 25); sternites without obvious posteromarginal lobes].... mariae

-. Ocellar setae I present, cheeks parallel (Fig. 7).............................................................. 3

3. Pronotum anteroangular setae rather short, shorter than submedian anteromarginal setae............ kratochvili comb. n. *

-. Pronotum anteroangular setae rather long, at least longer than submedian anteromarginal setae........................ 4

4. Mesosternal endofurca without spinula; mesonotum median setae situated in the middle of the sclerite; metanotal median setae near anterior margin (Fig. 17); tergites and sternites posterior margins without craspeda or teeth; tergite VIII posterior margin without comb..................................................................................... iridis

-. Mesosternal endofurca with spinula; mesonotum median setae close to posterior margin; metanotal median setae well behind anterior margin (Fig. 18); tergites and sternites posterior margin with craspeda or teeth; tergite VIII posterior margin with short teeth arising from lobes (Fig. 21).............................................................. lobulatus sp. n.