Abstract
Examination of immature tabanids collected from salt marshes from New Hampshire to Georgia revealed three morphologically distinguishable species of tabanid larvae and pupae. The adult greenhead horse flies reared from larvae and pupae collected in certain New England salt marshes north of Boston are recognizable as Tabanus nigrovittatus Macquart. In the salt marsh at Leeds Point, N.J., and in southern salt marshes, larvae collected mainly from the muddy banks of ditches and creeks were a larger species, Tabanus conterminus Walker. Mature larvae can be identified with key characters located on anterior and posterior segments. Pupae can be distinguished to species by characters on the frontal plate and the pupal aster. The smallest or early instars continue to be difficult to identify. Larvae and pupae of T. conterminus are described for the first time and keys are provided to larvae and pupae of the common salt marsh tabanids from the eastern United States Atlantic coast.
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