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Hedychrum is a large genus of cuckoo wasps -LRB- the family Chrysididae -RRB- .. Chrysididae. Chrysididae. With roughly 150 species , it is the second largest genus in the family ; most species are from the Palaearctic , but they can be found in the Oriental , Afrotropical , Nearctic , and Neotropical regions .. Palaearctic. Palaearctic. Oriental. Indomalaya ecozone. Afrotropical. Afrotropical. Nearctic. Nearctic. Neotropical. Neotropical