Eleven species of Cleridae (Coleoptera) have been previously recorded from the Adirondack Park in the state of New York. Three additional species (Placopterus thoracicus, Enoclerus muttkowskii, and Enoclerus nigrifrons) are recorded from the Adirondacks for the first time. Biological notes and collecting records are provided for all species. Characters are given for separating adults and larvae of Enoclerus muttkowskii from those of the superficially similar species Enoclerus ichneumoneus. The relationships of these two species are discussed
