Evolutionary Trends in Heteroptera. Part 1, Eggs, Architecture of the Shell, Gross Embryology and Eclosion. R. H. Cobben. Centre for Agricultural Publications and Documentation, Wageningen, The Netherlands, 1968. viii + 476 pp., illus. Dfl. 55. Laboratorium voor Entomologie, Wageningen, Mededeling No. 151. Also published as Agricultural Research Reports, No. 707