Members of the Micropezidae, commonly called stilt flies, consist of slender, long-legged flies found in most areas worldwide (some 500 species in about 40 genera). They are found predominantly in tropical regions, but their range extends in some temperate areas. Adults of extant forms are either predaceous on small insects or are attracted to animal excrement and decaying vegetation. The biologies of immatures is sparse, but those known have been recorded feeding upon roots and root nodules. Larvae of a wingless micropezid in Western Australia were found in the pitchers of the Albany pitcher plant, Cephalotus follicularis Labill. where they feed on decaying pitcher plant prey (Yeates, 1992).
Bachofen-Echt (1949) recorded three species of Baltic amber Calobata, but only one Baltic amber species has been described; it was placed in the genus Electrobata by Hennig (1965). In addition to the described taxa listed below, Hurd et al. (1962: 110) recorded undetermined material of this family from the Miocene amber of Chiapas, Mexico and Kohring & Schlüter (1989) recorded an undetermined specimen from the Pliocene Simetits amber depsoits of Sicily.
TREPIDARIA Meigen, 1800: 35. Name suppressed by I.C.Z.N. (1963:
*CALOBATA Meigen, 1803: 276. Type species: Musca petronella Linnaeus, 1758, by subsequent designation of Westwood (1840: 148).
rottensis Statz, 1940: 148 (Trepidaria). PA: Germany (Oligocene) [C].
ELECTROBATA Hennig, 1965: 41. Type species: Electrobata myrmecia
Hennig, 1965, by original designation.
myrmecia Hennig, 1965: 48. PA: Baltic Region (Eocene/Oligocene) [A].
tertiaria Meunier, 1908h: 265 (Calobata). PA: Baltic Region (Eocene/Oligocene) [A].
*MICROPEZA Meigen, 1803: 276. Type species: Musca corrigiolata
Linnaeus, 1767, by monotypy.
prompta Meunier, 1906a: 60. AF: Tanzania (Pleistocene/Holocene) [K].
RAINIERIA Rondani, 1843: 40. Type species: Calobata calceata Fallén, 1820, by original designation.
Undetermined sp. -- NT: Dominican Republic (Oligocene/Miocene) [A] (Grimaldi, 1995).