This first supplement to the 1992 catalogue of the Scolytidae and Platypodidae (Coleoptera) of the world (Wood and Bright, Great Basin Naturalist Memoir 13) updates the taxonomy, distribution, biology and literature pertaining to these families at the end of 1994. The format of this supplement follows closely that of the 1992 catalogue. Each genus and species is listed with its page number from the 1992 catalogue; additional information on figures, distribution, hosts and references relating to one or more of eight subject areas, as in the 1992 catalogue, are given. The bibliography included with this supplement lists 1420 references, most published between 1990 and 1994, including additional pre-1990 references missed in the 1992 catalogue or the previously published 1987 bibliography. Several 1995 references referring to taxonomy, host plants or general biology are also included. New synonymies and new combinations are proposed.