Catocala ultronia
Introduction '''''Catocala ultronia''''', the '''dark red underwing''' or '''ultronia underwing''', is a moth of the family Erebidae. The species was first described by Jacob Hübner in 1823.It is found in most of eastern North America, south to Florida and Texas. It ranges west across the southern parts of Canada to extreme southeast British Columbia.AdultThe wingspan is 46–60 mm. Adults are on wing in August in one generation depending on the location.The larvae feed on ''Fraxinus pennsylvanica'', ''Malus'' species, ''Populus grandidentata'', ''Prunus pensylvanica'', ''Prunus serotina'', ''Prunus virginiana'', and ''Tilia americana''.
References ==External links==**Oehlke, Bill. "''Catocala ultronia'' (Hubner, 1823) ''Eunetis ultronia''". ''The ''Catocala'' Website''. Archived November 22, 2008.