Distinguished for his contributions to knowledge of medical and veterinary entomology and parasitology in Australia, and as a leader of energetic research teams in these fields. In his research, by a combination of laboratory experiments and field studies, he has made distinguished contributions to the understanding of several problems, notably the sheep blowfly, cattle tick and buffalo fly. He developed an entomological service for the first time in the Australian Aney (1940-45) and under his inspiring leadership results of great value to the allied forces in the Pacific were achieved. He personally added much to the knowledge of dengue fever and malaria and to the control and taxonomy of the insect vectors. More recently he has developed and intensified research in the borderline fields of zoology and medicine, more particularly into the study of animals and birds in relation to transmission of human infectious diseases.