Eleven stonefly species representing seven genera and five families were collected during a two-year period of Malaise trapping and sweep netting at Mount Misery Brook, a small acidic, blackwater stream in the New Jersey Pinelands. The most common species, Allocapnia pygmaea, was collected from January through April. Leuctra ferruginea, the second most common species, was collected mainly in April and September through December. Nine new stonefly records are added for the state of New Jersey: Allocapnia pygmaea, Leuctra carolinensis, Leuctra ferruginea, Leuctra variabilis, Acroneuria lycorias, and Isoperla burksi from Mount Misery Brook (Burlington Co.); Paracapnia angulata from Babcock Creek (Atlantic County), Leuctra duplicata from a bog in Franklin Parker Preserve (Burlington Co.); and Pteronarcys dorsata from the Delaware River (Hunterdon County).