Two new species of halictine bees are described. A distinctive new species from high altitude in Ecuador is described on the basis of a single male. It appears to fall within the genus Caenohalictus as presently understood, although this diverse genus is badly in need of revision and may not be monophyletic. The concept of Mexalictus is expanded to include a new subgenus, Georgealictus, which appears to be an epiponine wasp mimic with a petiolate abdomen and elongate propodeum. This new subgenus is the sister-group to the nominate subgenus of Mexalictus. Mexalictus (Georgealictus) polybioides is described on the basis of one male and two females, all from high altitude in the state of Chiapas, Mexico.
