Biatoropsis hirtae and B. minuta are reported from Colorado, to our knowledge for the first time. These species were found growing on thalli of Usnea hirta and U. perplexans, respectively, during recent specimen collecting by the authors in the Front Range Mountains of north-central Colorado. The occurrences of these species throughout North America are likely more common and geographically broader than presently understood owing to frequent overlooking of populations. We provide discussion of their geographical ranges as presently understood and other notes of interest regarding species of Biatoropsis known from the United States.