It is found in the United States (Florida, Arkansas, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Jersey, New Mexico, New York, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Wisconsin)[1] and Mexico.

[2] The habitat consists of high quality barrens remnants.

Adults have been recorded on wing from April to August.

The larvae feed on Asclepias species.

[3] The species name is derived from Latin inopinatus (meaning unexpected, surprising).