Type species: Microdus delusor Wesmael, 1837.
Diatmetus Förster, 1862, first synonymized by Szépligeti (1904) and confirmed by Muesebeck (1927), Watanabe (1937), Mueseback and Walkley (1951), Shenefelt (1970), Gupta and Bhat (1974), Bhat and Gupta (1977), Marsh (1979), Chou and Sharkey (1989) and Braet (2002). Type species: Microdus gloriator Nees, 1812.
Distribution: Holarctic, Oriental, austral region of South America, especially diverse in cold temperate areas. Species described from Chile as Earinus are sister to the Hol- arctic and Oriental clade ( Sharkey et al. 2006). Th ere are no records from Thailand but we have captured one specimen.
Diversity: 15 species are described world-wide, and 3 from the Oriental region. Bhat and Gupta (1977) recorded only one species from the Oriental region. There are many undescribed species in Austral South America.
Biology: Most host records are on Noctuidae and Tortricidae.
Phylogenetic Information. Sister to all other Earinini ( Sharkey et al. 2006; and new unpublished data).
Diagnosis: This is the only agathidine genus in the Oriental region with a complete RS +M vein in the fore wing ( Fig. 26b).