Abstract
Acroceridae are active parasitoids of mygalomorph spiders. However, little is known of their interaction numbers and biology in the Neotropics. In this study, we present 15 new records of acrocerid-mygalomorph interactions, adding new biological information about spider fly development. Mygalomorph spiders were captured in the field and maintained in captivity, and the development time of acrocerids was followed from the 4th instar to adulthood. Only seven acrocerid flies were able to complete their development. The acrocerids obtained were Arrhynchus stuardoi, Arrhynchus maculatus, and Archipialea sp. The total recorded development time (from the point where the larva leaves its host to the eclosion of the adult fly) of the spider flies was between 20 and 29 days. The collaboration of citizen scientists could be a useful alternative in the future to fill gaps in the biological and ecological information about these parasitoid flies.
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