Locality: China, Xinjiang, Tian chi (Tien chi (Himmelssee) in Tian shan near Bofda Feng (mountain) (N 43°54', E 88°07'), 2000 m a.s.l., 30.vii.2009, leg. K.- G. Heller (5 males). According to the locality name in the description of the species and the comments and map in Sjöstedt & Hummel (1933), our specimens were collected at or very close to the type locality.
The calling song of M. tianshanica differs from that of all other Montana species. It consists of relatively short, polysyllabic (ca. 3–9 macrosyllables) echemes (syllable repetition rate ca. 25 Hz) separated from each other by intervals of about the same duration (Fig. 7 I). Regularly some echemes contain microsyllables at the beginning and only few macrosyllables.