What is "chrysura"

Chrysura is a genus of cuckoo wasp which parasitize megachilid bees. There are 117 species in Chrysura, all but 11 of which are found in the Palaearctic. The genus was described by Dahlbom in 1845, and the type species for the genus is Chrysura austriaca. It is the third largest genus in the family Chrysididae.