''Catharylla bijuga'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family

Crambidae The Crambidae are the grass moth family of lepidopterans. They are variable in appearance, the nominal subfamily Crambinae (grass moths) taking up closely folded postures on grass stems where they are inconspicuous, while other subfamilies includ ...

described by Théo Léger and Bernard Landry in 2014. It occurs in lowlands of the

Guianas The Guianas, sometimes called by the Spanish loan-word ''Guayanas'' (''Las Guayanas''), is a region in north-eastern South America which includes the following three territories: * French Guiana, an overseas department and region of France * ...

(Guyana, Suriname, and French Guiana) and

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The length of the forewings is 9–10.5 mm for males and 11–15 mm for females. The forewings are snow white, with a yellow-ochreous to brown costal margin, partially disrupted when meeting the transverse lines. The hindwings are snow white, the veins slightly ochreous.

Etymology

The species name refers to the bifid costal arm of the male genitalia and is derived from Latin ''bijugus'' (meaning yoked together, double).

References

Argyriini Moths of South America Lepidoptera of Brazil Lepidoptera of French Guiana Lepidoptera of Guyana Fauna of Suriname Moths described in 2014 {{Argyriini-stub