The aquatic insect community of treeholes in northern Indiana was surveyed from 1983-1986. Twenty-three species, representing three orders and nine families, were found. Megaselia scalaris (Diptera: Phoridae) was collected on several occasions from rotholes, the first member of this family from treeholes. Examination of puparia of Spilomyia longicornis (Diptera: Syrphidae) indicated that the larva of this species has been previously described, but incorrectly associated with the genus Xylata.
Copeland, Robert S.
"The Insects of Treeholes of Northern Indiana With Special Reference to Megaselia Scalaris (Diptera: Phoridae) and Spilomyia Longicornis (Diptera: Syrphidae),"
The Great Lakes Entomologist, vol 22
Available at: https://scholar.valpo.edu/tgle/vol22/iss3/4