This study is the first revision in 35 years of the native Hawaiian sphecid wasps of the genus Ectemnius. The author provides an original key to species, diagnoses, descriptions, distributions, and illustrations along with a compilation of all known biological information for each species.

This study is the first revision in 35 years of the native Hawaiian sphecid wasps of the genus Ectemnius. The author provides an original key to species, diagnoses, descriptions, distributions, and illustrations along with a compilation of all known biological information for each species.