A Revision of the Genus Dasyhelea Kieffer of the Eastern United States North of Florida (Diptera: Ceratopogonidae)

Eighteen species of Dasyhelea Kieffer are described and illustrated, of which 9 are new: brevicornis, brevicosta, leptobranchia, messcrsmithi, navaiac, pscudocincta, doincisurata, spinijorma , and stemlerae. D. subcaerulea Thomsen is synonymized with D. grisea (Coquillett) (NEW SYNONYMY). Species groups and subgeneric classification are discussed, and a key is given separation of the species.