Cover photograph (Copyright © 2007, American Society for Microbiology. All Rights Reserved.): Nudiviruses are proposed to be a new genus of viruses isolated from different orders of insects, e.g., Orthoptera, Coleoptera, and Lepidoptera. The complete genome of a nudivirus infecting the cricket Gryllus bimaculatus suggests a common ancestor of nudiviruses and baculoviruses. Despite their differing morphology, these viruses share similar genes involved in virus structure, the infection process, and gene transcription. (The genome map was drawn using Genevision software; the contribution of G. Rossen, C. Bauser, and T. Bopp to the artwork is acknowledged.) (See related article in May 2007: vol. 81, issue 10, page 5395.)