Rarisquamosa arfaki is a moth in the Eupterotidae family. It was described by Bethune-Baker in 1910. It is found in New Guinea. The wingspan is about 49 mm. The fore- and hindwings are rufous, the median area of the forewings broadly covered with fine grey hair-like scales and a broadish rufous line across the end of the cell and an irregular terminal area of similar grey scales. The postmedial area between these grey areas is clear rufous. The hindwings are uniform.