Rhopaloscelis maculatus, a species occuring in Russian Far East (Kuril Islands) and Japan, has been described from Japan by Henry Walter Bates in 1877 [▽].

Body length:	3.5 - 6 mm
Life cycle:	1 - 2 years [?]
Adults in:	May - July
Host plant:	polyphagous species
Distribution:	Russian Far East (Kuril Islands), Japan

The depicted beetle (6.5 mm) was collected on the right side of the Severyanka (Северянка) river valley (N44°20′18″ E146°00′42″; 20-40 m a.s.l., Kunashir/Кунаши́р island, Kuril Islands, Yuzhno-Kurilsky district, Sakhalin region, Russia) on July 28, 2013.

Collected by Kirill V. Makarov

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[▽]
Bates H.W.:
Three new species of Longicorn Coleoptera from Japan.
The Entomologist's Monthly Magazine, London 14 (2): 37-38, 1877. [download ]