Ulopeza idyalis is a species of moth in the family Crambidae.

It is found in Sri Lanka,[1] India, and on Borneo and Sulawesi.

[2] The forewings have three large costal yellowish-white iridescent semihyaline spots, the middle one much larger than the other two.

The third is subdivided and forms a very incomplete band by means of two hindward dots.

The costa and veins are mostly pale luteous (muddy yellow).