A REVISION OF THE HORSE FLY GENUS AGKISTROCERUS-PHILIP (DIPTERA, TABANIDAE)

The horse fly genus Agkistrocerus Philip is revised. Tabanus aurantiacus Bellardi from Mexico is transferred to Agkistrocerus, based on features of the head, body and wings. The female of aurantiacus is redescribed, the male is described for the first time, and the immature stages are described and figured, the first for the genus. The male of A. finitimus (Stone) is described for the first time. Notes on the species included are provided, as are illustrations of principal taxonomic features. A revised key to the genera of Nearctic Tabanini also is presented.