Allothrips Hood 1908

Key to Allothrips species from Southeast Asia

[* Based on original descriptions]

1. Head laterally with many small capitate setae (Fig. 7) [USA, Taiwan]................................... nubillicauda

-. Head laterally with small acutely pointed setae (Fig. 8)....................................................... 2

2. Head uniformly covered with strong reticulate sculpture; abdominal segments II–VIII brown but head, thorax and abdominal segments IX–X yellow [Taiwan].................................................................. taiwanus *

-. No more than posterior third of head with reticulate sculpture; body colour different................................ 3

3. Head with mid-dorsal setae arising on posterior half of head, far posterior to postocular setae, and usually capitate........ 4

-. Head with mid-dorsal setae arising on anterior half of head, between or a little posterior to a line joining the bases of the postocular setae, usually small and acute (Figs 1, 8)............................................................. 5

4. Postocular setae longer than dorsal length of compound eyes; mid-dorsal head setae small and acute; antennal segments II–III each with 2 capitate setae [Thailand]................................................................ magnus *

-. Postocular setae shorter than dorsal length of compound eyes; mid-dorsal setae strong and capitate; antennal segments II–IV each with 2 capitate setae [Thailand]............................................................... expansus *

5. Head with lateral postocular setae capitate (Fig. 8); mesonotum of apterae with three pairs of capitate setae, two laterally and one sub-median; pelta anterior third with no sculpture; tergite IX setae S2 as capitate as setae S1; tube less than 1.8 times as long as basal width; tergite IX almost as brown as VIII; legs yellow but femora washed with light brown [Brazil, Hawaii, Japan]............................................................................................. brasilianus

- Head with lateral postocular setae pointed (Fig. 1); mesonotum of apterae usually with only the lateral pairs of setae capitate; pelta anterior third reticulate (Fig. 3); tergite IX setae S2 bluntly pointed to weakly capitate, in contrast to strongly capitate setae S1; tube 2.0 times as long as basal width; tergite IX yellow in contrast to VIII (Fig. 4); legs uniformly light brown [Yunnan]....................................................................................... yunnanensis sp.n.