Seven new species of Glossosomatidae are described from Bolivia. The seven new Bolivian species are: Mexitrichia collegarum
n. sp., M. eduardoi n. sp., M. marini n. sp, M. usseglioi n. sp, Protoptila alumnorum n. sp, P. goitiai n. sp and P. myriamae n.
sp. 18 species are recorded at the moment from Bolivia and northwestern Argentina: Merionoptila wigodzinskyi, Mexitrichia
albolineata, M. bolivica, M. pocita, M. punensis, M. simla, M. argentinica, M. paraenchrysa, M. wygodzinskii, Protoptila
dubitans, P. misionensis and the seven new species. A list of species of Glossosomatidae from Bolivia and northwestern Argentina
is provided with new distributional records.