Varying lengths of horseflies in the family Tabanidae which key to the greenhead horsefly (Tabanus nigrovittatus) collected across multiple salinity zones within Louisiana's Coastal Marshes from 2019-05-16 to 2019-09-11

Some of the horseflies keying to the greenhead horsefly (Tabanus nigrovitattus) in Tidwell's Key to Louisiana Tabanidae may be cryptic species. In order to separate congenerics a dataset was created to explore variation in Tabanid length across salinity zones at different times of the year.