T HERE are few reports of repeated venom extractions from single snakes or groups of snakes. Fairly and Splatt (1929) made a number of observations on the Australian elapids, Notechis scutatus, Acanthophis antarcticus, Denisonia superba, and Pseudechis porphyriticus. They extracted venom from their specimens at monthly intervals for periods of 2 to 7 months. While they found that the average secondary yield for all species was lower than the average primary yield, there were exceptions among the individual snakes. Of 3 Pseudechis milked 5 times, one gave its maximum yield on the fifth extraction, and all gave more on the fifth milking than on the first. Two of 20 Acanthophis gave maximal yields on the fourth extraction. A Denisonia milked 7 times gave its maximum yield on the 265