Leucospis is a genus of wasps belonging to the family Leucospidae. Most species are brightly coloured with yellow and black patterning and about 2 cm long. They have characteristically enlarged femurs on the hind leg, with the lower margin toothed. The wings have a longitudinal fold and the long ovipositor is bent over their backs above the abdomen or metasoma. They are parasitic on wasps and solitary bees that construct cells and provision food for their offspring. The Leucospis larvae live and grow as ectoparasites of the host larvae. Usually, only one parasite emerges from a single cell. The genus Micrapion from South Africa is very closely related, and phylogenetic studies suggest merging of the two genera. The genus Leucospis is found across the world in the tropical regions.

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