New species of Idris Förster (Hymenoptera, Platygastroidea) from southeast Asia, parasitoids of the eggs of pholcid spiders (Araneae, Pholcidae)

Four new species of the genus Förster (Hymenoptera: Platygastroidea), reared from the eggs of pholcid spiders (Araneae: Pholcidae) in southeast Asia are described on the basis of external morphology and the barcode region of the mitochondrial COI gene. The new species and their hosts are: Johnson & Chen, (ex (Deeleman-Reinhold), Huber), Johnson & Chen, (ex Huber), Johnson & Chen, (ex Huber, Huber, (Huber), Simon), and (ex Huber).