Abstract
Cryptalyra is a small genus of megalyrid wasps with three described species confined to South America. Our main goal in this work is to record an increase in the known diversity, adding the three new species Cryptalyrahelenae sp. n., Cryptalyraichiroi sp. n. and Cryptalyralimeirai sp. n., from a single locality in Maranhão, Brazil that has been subjected to extraordinary collecting effort. We are providing a key for the species of the genus, as well as illustrations of the main structures for recognition of the new taxa.