In this paper are presented diagnoses of seven new species of mvgalomorph spiders, one of which, represents the new genus Hesperopholis. The other species are placed in Delopelma. We are indebted to Dr. W. P- Cottam for making the photographs reproduced 0 11 the first three plates. All of these are taken at the same scale, which is a little less than natural size, the ratio being about 9:11. Excepting the holotypes of Delopelma radinum D. simulatum, and I), moderatum, which are in the American Museum of Natural History, the tvpes are in the University of Utah collection.