A probe was undertaken to determine what viruses in the California complex of the California group, occurred in interior Alaska, and if biting flies were hosts. An insect net was used instead of traps, and an LD-40 wide mouth liquid nitrogen container was used for asphyxiating, freezing, and storing the specimens in the field. Biting flies were collected at intervals during the summer from June, 1970 though August, 1972 at five locations: Northway, Dot Lake, Fairbanks, New Minto and Tanana. Snowshoe hare (SSH) virus of the California complex was recovered from Aedes cinereus Meigen, A. communis (DeGeer), A. excrucians (Walker), A. fitchii (Felt & Young), A. hexodontus complex, A. intrudens Dyar, A. punctor complex, and from a black fly, Simulium n. sp?. There were 48 recoveries, some from all localities. This is the only virus of the California complex known to occur in Alaska. Therefore California encephalitis disease caused by CE virus, the type virus of the complex, is now believed not to occur in Alaska. Northway virus, of the Bunyamwera group, was discovered from A. excrucians, hexodontus complex, punctor complex and Culiseta alaskaensis (Ludlow). There were 5 recoveries from three localities: Northway, Dot lake, and New Minto. One recovery was from pool 0234 containing the Northway type virus. The viruses were recovered by the Virology unit at the Arctic Health Research Center and identified by the Arbovirus Section at the Center for Disease Control in Atlanta, Georgia. The information concerning the viruses and mammals has been published.