My esteemed friend, Dr. L. Gundlach, has left to me the task of describing several nerv Bombyces, which he discovered within the last few years in Cuba. Some of the specimens which are uniques, are, unfortunately, in such a poor state that a thorough description was well-nigh impossible. In one case I had to refrain entirely, on account of the dilapidated condition of the insect. All the types belong to the Museo Cubano Zoologico de Gundlach, lately acquired by the Spanish Government.