Chaenusa psillosae Kula, new species from the Nearctic Region is described. Specimens upon which the new species is described were reared from an undetermined species of Hydrellia Robineau-Desvoidy infesting Sagittaria latifolia Willd. A key to the NewWorld species of Chaenusa sensu lato is amended to include the new species.
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Alysiinae
biological control
Dacnusini
Hydrellia
parasitoid
Sagittaria latifolia
taxonomy