Alcathous is a monotypic genus containing the species Alcathous fecialis: a fulgorid planthopper, in the subfamily Amyclinae and found in southern India.

It is predominantly brown with dark markings.

Its snout curves slightly upward, and its wings are about 3 cm long and hide its short abdomen.

From its eyes to the tip of its abdomen, A. fecialis is about 1.2 cm long with a 0.3 cm snout.

This Fulgoromorpha article is a stub.