A new species of Triphleps has been received by the Imperial Bureau of Entomology from Mr. E. Ballard, who reports it as attacking the eggs of Heliothis obsoleta, H.S., in Queensland. Although there are already forty-four species of Triphleps described from all parts of the world, this is the first species to be recorded from Australia. Garman & Jewett have previously (1914) reported Triphleps insidiosus, Say, as feeding on the eggs of H. obsoleta, H.S., in the United States.