Siamothrips balteus, a new species of Scirtothrips genus-group from China (Thysanoptera, Thripidae)

The third species of the genus Siamothrips Okajima, Siamothrips balteussp. n., is described from China. The new species is characterised by the abdominal tergite II uniformly brown, III-VII with a brown area medially but pale on lateral thirds, tergite VIII smooth medially, tergite X with 3-4 rows of microtrichia medially, and abdominal sternite VII with one pair of discal setae laterally. A key to the three species has been constructed and is presented here.