A New Species of Megaselia (Diptera: Phoridae) Associated with Brood Provisions of Nests of Neocorynura (Hymenoptera: Halictidae)
Males and females of Megaselia neocorynurae n. sp. from the Eastern Andes of Colombia are described and illustrated. Females of this species can be recognized by the peculiar white color of the region of tergites 5 and 6 in the abdomen, and males by the combination of rela tively large body size, dark color, presence of four supra antennal setae and four large scutellar se tae, and the unusual erect cerci of the terminalia. Larvae of M. neocorynurae n. sp. were found feeding on brood provision 11.4 and 14.9% of the cells of two as yet undescribed species of Neo corynura. These associations represent the first halictid host for Megaselia as well as the first ex amples of this phorid fly genus as a kleptoparasite of halictid bees. Biological information of M. neocorynurae n. sp. is compared with that known for Phalacrotophora halictorum, the only pre viously known phorid fly associated with brood provisions of Halictidae.