''Heterostylum'' is a genus of

flies Flies are insects of the Order (biology), order Diptera, the name being derived from the Ancient Greek, Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwin ...

belonging to the family

Bombyliidae The Bombyliidae are a family of flies, commonly known as bee flies. Some are colloquially known as bomber flies. Adults generally feed on nectar and pollen, some being important pollinators. Larvae are mostly parasitoids of other insects. Over ...

(bee-flies). There are 14 described species, distributed throughout the

Americas The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...

. These are robust and very hairy flies with a body length of 10–15 mm. They can be distinguished from similar genera by an indentation in the hind margin of the eye and unique wing venation.

Larva A larva (; : larvae ) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects, some arachnids, amphibians, or cnidarians typically have a larval phase ...

e of the genus feed on mining bees.

Species

*'' Heterostylum bicolor'' ( Loew, 1861) - Neotropical: Cuba. *'' Heterostylum croceum'' Painter, 1930 - Nearctic: USA (Colorado, Kansas, Missouri, New Mexico, Texas) *'' Heterostylum deani'' Painter, 1930 - Nearctic: USA (Colorado, Kansas, Wyoming) *'' Heterostylum duocolor'' (Painter & Painter, 1974) - Neotropical: Argentina *'' Heterostylum engelhardti'' Painter, 1930 - Nearctic: USA (Arizona, California, Texas, Utah). *'' Heterostylum evenhuisi'' Cunha & Lamas, 2005 - Neotropical: Brazil: Bahia, Ceará, Goiás, Pará, Pernambuco, Rio Grande do Norte, São Paulo. *'' Heterostylum ferrugineum'' ( Fabricius, 1805) - Neotropical: Bolivia, Brazil (Bahia, Ceará, Mato Grosso, Roraima, São Paulo) *'' Heterostylum engelhardti'' Painter, 1930 - Nearctic: USA (Arizona, California, Texas, Utah). *'' Heterostylum haemorrhoicum'' ( Loew, 1863) - Neotropical: Cuba, Haiti. *'' Heterostylum helvolum'' Hall and Evenhuis, 1981 - Nearctic: Mexico (Sinaloa, Sonora, Tamaulipas, Zacatecas). *'' Heterostylum hirsutum'' ( Thunberg, 1827) - Neotropical: Argentina, Brazil, Colombia, Paraguay, Venezuela. *'' Heterostylum maculipennis'' Cunha & Lamas, 2005 - Nearctic: Brazil: Rio de Janeiro, Santa Catarina, São Paulo *'' Heterostylum pallipes'' Bigot, 1892 - Neotropical: Haiti. *'' Heterostylum robustum'' ( Osten Sacken, 1877) - Nearctic: Canada (Alberta), Mexico (Baja California, Baja California Sur, Coahuila de Zaragoza, Guerrero, Morelos, Nuevo León, Puebla, Sinaloa, Sonora, Tamaulipas), USA (Arizona, California, Colorado, Georgia, Idaho, Kansas, Nevada, New Mexico, Oklahoma, Oregon, Texas, Utah). *'' Heterostylum rufum'' ( Oliver, 1789) - Neotropical: Argentina, Brazil (Acre), Guatemala, Guyana, Mexico (Tabasco), Peru, U.S. Virgin Islands.

References

{{Taxonbar, from=Q5747799 Bombyliidae Bombyliidae genera Diptera of North America Taxa named by Pierre-Justin-Marie Macquart