''Catocala semirelicta'', the semirelict underwing, is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

of the family

Erebidae The Erebidae are a family (biology), family of moths in the superfamily Noctuoidea. The family is among the largest families of moths by species count and contains a wide variety of well-known macromoth groups. The family includes the underwin ...

. The species was first described by

Augustus Radcliffe Grote Augustus Radcliffe Grote (February 7, 1841 – September 12, 1903) was a British entomologist who Species description, described over 1,000 species of Lepidoptera, butterflies and moths.Osborn, H. 1937. Fragments of Entomological History. Columb ...

in 1874. It is found in North America from

Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, and

Nova Scotia Nova Scotia is a Provinces and territories of Canada, province of Canada, located on its east coast. It is one of the three Maritime Canada, Maritime provinces and Population of Canada by province and territory, most populous province in Atlan ...

south to

Maine Maine ( ) is a U.S. state, state in the New England region of the United States, and the northeasternmost state in the Contiguous United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Provinces and ...

, west across

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...

, and southward in the mountains. Catocola pura

The length of the forewings is about 30 mm. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the opposite wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingsp ...

is 65–75 mm. Adults are on wing from July to September in one generation depending on the location. The larvae feed on ''

Populus balsamifera ''Populus balsamifera'', commonly called balsam poplar, bam, bamtree, eastern balsam-poplar, hackmatack, tacamahac poplar, tacamahaca, is a tree species in the balsam poplar species group in the poplar genus, ''Populus.'' The genus name ''Populus ...

'', ''

Populus tremuloides ''Populus tremuloides'' is a deciduous tree native to cooler areas of North America, one of several species referred to by the common name aspen. It is commonly called quaking aspen,

'', and ''

Salix Willows, also called sallows and osiers, of the genus ''Salix'', comprise around 350 species (plus numerous hybrids) of typically deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions. Most species are known ...

'' species. There is probably one generation per year.

Subspecies

*''Catocala semirelicta semirelicta'' Grote, 1874 *'' Catocala semirelicta hippolyta'' Strecker, 1874 The latter is sometimes considered a distinct species.

References

External links

*Oehlke, Bil
"''Catocala pura'' = ''semirelicta'' Hulst, 1880"
''The Catocala Website''. Archived August 21, 2012. * *Oehlke, Bil

''The Catocala Website''. Archived September 14, 2009. *Oehlke, Bil

''The Catocala Website''. Archived August 21, 2012. semirelict Moths of North America Moths described in 1874 {{Catocalini-stub