Subfamily Acrocerinae Zetterstedt, 1837

Type genus.

Acrocera Meigen 1803: 266.

Diagnosis.

Small to medium sized, densely pilose to apilose, body rarely arched; antennal flagellum stylate; postpronotal lobes widely separated, never medially contiguous; wing venation highly variable, ranging from complete with cells cu-p, bm br, d, m3 and basal r4+5 present, to highly reduced with few closed cells; humeral crossvein rarely well developed; tibial apical spines absent (rarely present); larvae exclusively parasitoids of araneomorph spiders.