Heterostylum is a genus of flies

Fließ

Fließ is a municipality in the Landeck district and is located5 km south of Landeck on the upper course of the Inn River. It has 9 hamlets and was already populated at the roman age; the village itself was founded around the 6th century. After a conflagration in 1933 Fließ was restored more...

 belonging to the family Bombyliidae

Bombyliidae

Bombyliidae is a large family of flies with hundreds of genera, although their life cycles are not well known. Adults generally feed on nectar and pollen, thus are pollinators of flowers. They superficially resemble bees, thus are commonly called bee flies, and this may offer the adults some...

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

Americas

The Americas, or America , are lands in the Western hemisphere, also known as the New World. In English, the plural form the Americas is often used to refer to the landmasses of North America and South America with their associated islands and regions, while the singular form America is primarily...

. 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

Larva

A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

e feed on mining bees.

Species

• Heterostylum bicolor (Loew
  Hermann Loew
  Friedrich Hermann Loew was a German entomologist who specialised in the study of Diptera, an order of insects including flies, mosquitoes, gnats and midges...
  
  , 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
  Johan Christian Fabricius
  Johan Christian Fabricius was a Danish zoologist, specialising in "Insecta", which at that time included all arthropods: insects, arachnids, crustaceans and others...
  
  , 1805) - Neotropical: Bolivia, Brazil (Bahia, Ceará, Mato Grosso, Roraima, São Paulo)
• Heterostylum engelhardti Painter, 1930 - Nearctic: USA (Arizona, California, Texas, Utah).
• Heterostylum haemorrhoicum (Loew
  Hermann Loew
  Friedrich Hermann Loew was a German entomologist who specialised in the study of Diptera, an order of insects including flies, mosquitoes, gnats and midges...
  
  , 1863) - Neotropical: Cuba, Haiti.
• Heterostylum helvolum Hall and Evenhuis, 1981 - Nearctic: Mexico (Sinaloa, Sonora, Tamaulipas, Zacatecas).
• Heterostylum hirsutum (Thunberg
  Carl Peter Thunberg
  Carl Peter Thunberg aka Carl Pehr Thunberg aka Carl Per Thunberg was a Swedish naturalist and an apostle of Carl Linnaeus. He has been called "the father of South African botany" and the "Japanese Linnaeus"....
  
  , 1827) - Neotropical: Argentina, Brazil, Colombia, Paraguay, Venezuela.
• Heterostylum maculipennis Cunha & Lamas, 2005 - Nearctic: Brazil: Rio de Janeiro, Santa Catarina, São Paulo
• Heterostylum pallipes Bigot
  Jacques-Marie-Frangile Bigot
  Jacques Marie Frangile Bigot was a French naturalist and entomologist most noted for his studies of Diptera. Born in Paris, where he lived all his life, though he had a small house in Quincy-sous-Sénart, Essonne.He became a member of the Entomological Society of France in 1844. His first paper...
  
  , 1892 - Neotropical: Haiti.
• Heterostylum robustus (Osten Sacken
  Karl Robert Osten-Sacken
  Baron Karl-Robert von Osten-Sacken was a Russian diplomat and entomologist. He served as the Russian consul general in New York during the American Civil War, living in the United States from 1856 to 1877....
  
  , 1877) - Nearctic: Canada (Alberta), Mexico (Baja California Norte, 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
  Guillaume-Antoine Olivier
  Guillaume-Antoine Olivier was a French entomologist.He was the author of Entomologie, ou histoire naturelle des Insectes and Le Voyage dans l'Empire Othoman, l'Égypte et la Perse . He was a close friend of Johan Christian Fabricius and a patron of Pierre André Latreille.-References:...
  
  , 1789) - Neotropical: Argentina, Brazil (Acre), Guatemala, Guyana, Mexico (Tabasco), Peru, U.S. Virgin Islands.