Seasonal distribution of northern New York State anthropophilic Tabanidae (Diptera) and observations on the dispersal of several species.

In a 154-km2 area of Franklin Co., New York State, 47 sites were monitored biweekly or weekly for 2 consecutive adult tabanid seasons. Investigators used standard aerial insect nets and captured 10 969 tabanids during 1380 ten-min sweeps. Four genera and 37 species were collected, with Chrysops ater (43%) and C. mitis (15%) predominant. The collection method was more selective of Chrysops (96% of total Tabanidae) than Hybomitra, Stonemyia or Tabanus. In addition, over 600 adults of C. dawsoni, a species only recently detected in New York, were captured. New extensions of nuisance activity were documented for 7 species. In addition to seasonal distribution data on 37 northern New York tabanid species and relationships of major species collected to habitat, observations are also reported on the dispersal of C. ater and C. mitis recaptured at sites _7 km from the release site and which dispersed to other sites at a rate of _1.2 km/h. Sixteen of 520 (3.1%) marked and released Chrysops adults were recaptured.