REVISION OF THE GENUS SITONA (COLEOPTERA, CURCULIONIDAE) OF NORTH-AMERICA

North American species of Sitona Germar are reviewed. Eleven species, five introduced from Europe, are recognized. Sitona lineellus (Bonsdor ff) is established as the correct name for the widely recognized S. sc issifrons Say. Three new species are described: S. desertus and S. tan neri from southern California and S. aquilonius from northern Canada. New synonymies are S. ordinarius Fahraeus, S. occidentalis Casey, S. b ryanti Tanner (=S. californius Fahraeus); S. procerus Casey (=S. cylin dricollis Fahraeus); and S. margaritosus Casey, S. eximius Casey, S. m ontanus Casey, S. alternans Casey, S. osculans Casey, S. sparsus Casey (=S. vittatus LeConte). Lectotypes are designated for S. extrusus Cas ey, S. hispidiceps Casey, S. margaritosus Casey, S. eximius Casey, S. montanus Casey, and S. osculans Casey. All species are described and k eyed. Distribution maps are given for more common, widely distributed species. Photographs of elytral vestiture and drawings of the female 8 th sternite and the apex of the aedeagus are given for each species. H abitus illustrations are given for S. flavescens, S. hispidulus, and S . californius.