The two tribes of subfamily Derbinae are distinguished by counting the number of forewing veins that reach the posterior and apical margins. Mysidiini species have 16 or fewer of these veins, while Derbini have 20-23. The largest genus in the tribe is Mysidia with 34 species found from the southern U.S. and Jamaica to Bolivia and Peru.
Moth Derbids are phloem feeders.
Photo location: Amazonas state, Brazil.
American Insects site