Two new species of Acrometopae and the female of Lamecosoma inermis Ragge are described from Tanzania, East Africa. Horatosphaga parensis n. sp. occurs in montane forest clearings of the South and North Pare Mountains. Peronura uguenoensis n. sp. inhabits herbaceous vegetation in the North Pare Mts. Notes on altitudinal distribution and habitat requirements are given for both species. L. inermis is an inhabitant of the savannah grasslands in the colline and submontane zone of southeast and eastern Kilimanjaro.