Very few Phalangids have been collected on our mountains, and so it is not surprising that a new species of a genus which in Europe lives in high altitudes should be found on Mt. Washington, New Hampshire. Early in September 1893, Mrs. Annie T. Slosson kindly sent me several vials of arachnids from the White Mts., and among them o vial from Mt. Washington containing six specimens of a beautiful new species of Oligolophus. It differ from the other American species which have been referred to that genus in lacking spines to the femur of the palpus, thus resembling some alpine European forms.