This orchid-living species has not been studied by the present authors.
The genus Trichromothrips, together with its synonym Dorcadothrips, currently includes 34 species. These species apparently originated in the area between Southeast Asia and Australia, but several of them are now more widespread around the world (Bhatti, 2000). T. xanthius is apparently unique within this genus in having coarse-grained dark areas on either side of abdominal sternites V and VI (Nakahara, 1993).
Trichromothrips xanthius (Williams)
Cattleya sp.; Cypripedium sp.; Laelia sp.; Odontoglossum sp. (Orchidaceae).
Presumably Southeast Asia.
Taken in greenhouses widely around the world (Nakahara, 1993: 408).