Mesandrothrips brevisetis, Okajima & Masumoto, 2025

Mesandrothrips brevisetis sp. nov., from Ryukyus, Japan

Mesandrothrips crassicornis sp. nov., from Peninsular Malaysia

Mesandrothrips darci (Girault) , from Australia

Mesandrothrips eximius sp. nov., from Vietnam

Mesandrothrips flavitibia (Ananthakrishnan & Jagadish) , from India

Mesandrothrips ichikaianus sp. nov., from Honshu, Japan

Mesandrothrips inquilinus (Priesner) , from Java, Indonesia

Mesandrothrips inquinatus (Karny) , from Java, Indonesia

Mesandrothrips subterraneus (Crawford JC) , from Europe and eastern Asia

Key to Mesandrothrips species

[excluding M. darci (Girault) View in CoL ; M. flavitibia View in CoL and M. inquinatus View in CoL are based on descriptions*]

1. Postocular setae longer than eyes; tube longer than 0.62 times as long as head; terminal tube setae almost as long as tube............................................................................................. subterraneus View in CoL

- Postocular setae shorter than eyes; tube shorter than 0.60 times as long as head, if longer, mesopresternum very small; terminal tube setae longer than tube.............................................................................. 2

2. Body bicolored pale brown and yellow ( Fig. 58 View FIGURES 57–69 ); head, prothorax, mesothorax and tube brown; metathorax yellow, abdomen and legs largely yellow................................................................. crassicornis sp. nov.

- Body uniformly dark brown, femora largely brown to dark brown............................................... 3

3. All tibiae yellow............................................................................... flavitibia View in CoL *

- Mid and hind tibiae largely brown or banded brown.......................................................... 4

4. Antennal segments IV–VI pale brown............................................................ inquinatus View in CoL *

- Antennal segments IV–VI yellow at base, often wholly yellow................................................. 5

5. Antennal segments IV–VI wholly yellow; basantra largely developed ( Fig. 80 View FIGURES 78–85 ), a little wider than long..... eximius sp. nov.

- Antennal segments IV–VI shaded with brown at apical half; basantra small to moderately large, much wider than long..... 6

6. Basantra small, inner margin narrowly bluntly pointed ( Fig. 87 View FIGURES 86–93 ); tube much longer than 0.6 times as long as head; fore tarsal hamus developed ( Fig. 91 View FIGURES 86–93 )............................................................... ichikaianus sp. nov.

- Basantra normally developed, inner margin linear, not pointed; tube much shorter than 0.6 times as long as head; fore tarsal hamus small......................................................................................... 7

7. Head somewhat broader, about 1.2 times as long as wide ( Fig. 62 View FIGURES 57–69 ); maxillary bridge much narrower than half of head width in female, 0.40–0.49 times as wide as head in male; four pairs of prothoracic setae relatively short, e.g. pa shorter than 40µm; tergite IX S2 setae shorter than tube.......................................................... brevisetis sp. nov.

- Head somewhat longer, about 1.4 times as long as wide ( Fig. 94 View FIGURES 94–101 ); maxillary bridge wider than half of head width); four pairs of prothoracic setae elongate, e.g. pa longer than 50µm; tergite IX S2 setae a little longer than tube.............. inquilinus View in CoL