On the Route of the Zoological Subunit of the Commission for the Study of Productive Resources of the Yakut ASSR, Headed by L.V. Bianchi, in Central Yakutia in 1925

The route of the zoological subunit of the Yakut complex expedition of the USSR Academy of Sciences for the study of the productive resources of the Yakut ASSR in 1925 is described. The expedition, including researchers from the Zoological Institute of the USSR Academy of Sciences L.V. Bianchi (head) and A.I. Ivanov, collected insects in the Lena-Amga interfluve. First, they explored the right bank of the Lena River from Bestyakh Station to Kachikattsy Village, then crossed the Lena-Amga interfluve through the Menda and Tengyutte river basins, then rafted down the Amga River from the Tengyutte River mouth to Amga Village, and returned to Bestyakh Station by the Amga-Yakutsk road. Geographic coordinates of the collection localities and camping places along the entire expedition route are given for the first time; many of the visited localities are not marked in the modern maps.