32 lichen species are reported from Bolivia, 21 of whicluare new to the country: Aspi- dothelium cinerascens Vain., Bunodophoron melanocarpitm (Sw.) Wedin, Cystocoleus ebeneus (Dill- wyn) Thwaites, Dibaeis absoluta (Tuck.) Kalb & Gierl, Dictyonema minus Liicking, Navarro & Sip- man, Endocarpon simplicatum (Nyl.) Nyl. var. bisporum McCarthy, Glyphis cicatricosa Ach., Graphis illinata Eschw., G. miniata Redgr., Leprocaulon arbuscula (Nyl.) Nyl., L. gracilescens (Nyl.) Lamb & Ward, Phaeographopis neotropica Kalb, Placidium squamulosum (Ach.) Breuss var. argentinum (Räsänen) Breuss, Placynthiella icmalea (Ach.) Coppins & P. James, P. uliginosa (Schrad.) Coppins & P. James, Pseudephebe pubescens (L.) M. Choisy, Sarcographa cinchonarum Fee, Toninia auriculata Timdal, T. hosseusiana Gyeln., T. tristis (Th. Fr.) Th. Fr. ssp. asiae-centralis (H. Magn.) Timdal and Trapeliopsisflexuosa (Fr.) Coppins & P. James. Of these taxa, Endocarpon simplicatum (Nyl.) Nyl. var. bisporum McCarthy, Phaeographopis neotropica Kalb and Trapeliopsis flexuosa (Fr.) Coppins & P. James are new to South America. Key Words: Lichens, phytogeography, South America, Bolivia