Abstract

The Australian Pangoniini include the most primitive known Tabanidae. Most are low-flying insects, which do not suck blood. They show progressive reduction in mandibles of the female, divisions of the third antenna1 segment, and hind tibia1 spurs. Their principal distribution is east coastal, from Torres Strait to southern New South Wales; there is a secondary centre of evolution in Western Australia; they are not known from Tasmania. Eighteen species are recognized, distributed among seven genera and subgenera, as follows: Austroplex, 3; Ectenopsis (Ectenopsis), 4; Ectenopsis (Parasilvius), 4; Ectenopsis (Leptonopsis), 2; Caenoprosopon, 4; Therevopangonia, 1. Three new species are described from Western Australia: Ectenopsis (?Ectenopsis) occidentalis, B ; Ectenopsis (Parasilvius) fusca, B, @ ; Ectenopsis (Leptonopsis) norrisi, B .