Blera is primarily a North American genus, though there are 3 species from Europe. The genus is characterized by the following characters: face with distinct central knob, less developed in females; frons distinctly produced antennae shorter than head width, arista dorsal body covered long sometimes dense hairs legs simple bare and undeveloped metasternite short apical section of vein R 4+5
The larvae are found in decaying heartwood in roots of trees and stumps.
There are keys to American and British species. external map
Species
Blera ambigua (Shiraki, 1968) Blera analis (Macquart, 1842) Blera armillata (Osten Sacken, 1875) Blera badia (Walker, 1849) Blera chillcotti Thompson, 2012 Blera confusa Johnson, 1913 Blera eoa (Stackelberg, 1928) Blera equimacula Huo, Ren & Zheng, 2007 Blera fallax (Linnaeus, 1758) Blera ferdinandi (Hervé-Bazin, 1914) Blera flukei (Curran, 1953) Blera garretti (Curran, 1924) Blera himalaya Thompson, 2000 Blera humeralis (Williston, 1882) Blera japonica (Shiraki, 1930) Blera johnsoni (Coquillett, 1894) Blera kyotoensis (Shiraki, 1952) Blera lonigseta Barkalov & Cheng, 2011 Blera metcalfi (Curran, 1925) Blera nigra (Williston, 1887) Blera nigrescens Shiraki, 1968 Blera nigripes (Curran, 1925) Blera nitens (Stackelberg, 1923) Blera notata (Wiedemann, 1830) Blera ochrozona (Stackelberg, 1928) Blera pictipes (Bigot, 1884) Blera robusta (Curran, 1922) Blera scitula (Williston, 1887) Blera shirakii Barkalov & Mutin, 1991 Blera umbratilis (Williston, 1887) Blera violovitshi Mutin, 1991 Blera yudini Barkalov, 1991
References