''Mydas xanthopterus'' is a species of mydas flies in the family

Mydidae The Mydidae (sometimes misspelled as Mydaidae), or Mydas flies, are a cosmopolitan family of flies. It is a small family, with about 471 species described. They are generally large in size, including the largest known fly, '' Gauromydas heros'' ( ...

. ''Mydas xanthopterus'' occur in North America (Mexico and the United States). They resemble red-winged '' Pepsis'' species and are possibly

Batesian mimics Batesian mimicry is a form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species directed at a predator of them both. It is named after the English naturalist Henry Walter Bates, after his work on Bu ...

. They occur in sympatry with ''

Pepsis grossa ''Pepsis grossa'' is a very large species of pepsine spider wasp from the southern part of North America, south to northern South America. It preys on tarantula spiders, giving rise to the name tarantula hawk for the wasps in the genus ''Pepsi ...

''.

References

Mydidae Diptera of North America Insects described in 1866 Taxa named by Hermann Loew {{Asiloidea-stub