Euchlaena madusaria, the scrub euchlaena moth, is a species of moth of the family Geometridae. It is found in North America, where it has been recorded from British Columbia, east to Nova Scotia, south to Florida, Missouri and Oregon. The habitat consists of dry woodlands. The wingspan is about 28 mm. The ground colour of the forewings is yellow-tan with fine but well-defined antemedial, postmedial and subterminal lines. The outer third is darker. Adults are mainly on wing from May to August.