No. 126 (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini)

Three new species of the rare cleptoparasitic bee genus Austrostelis are described. Austrostelis mexicana and A. costaricensis extend its range into Mesoamerica, while A. bicolor from Venezuela sheds light on its diversity in northern South America.