BRACHYCERA, Muscomorpha Schizophora Acalyptratae, Opomyzoidea

Number of British species: 2

Size: T

Difficulty: 3


Minute (1-2 mm), delicate, yellow to grey flies with inner vertical bristles curving forward. Arista with long rays; ocelli present with the ocellar triangle situated more or less in middle of frons; Ocellar bristles absent; Postvertical bristles small and diverging or absent; 2 pairs of frontal bristles, lower pair curving inward; interfrontal bristles absent; vibrissae and a series of vibrissa-like bristles present. Wing clear or with tinged spots; costa with a subcostal break; vein Sc incomplete; crossvein BM-Cu absent; crossvein DM-Cu present or absent; cell cup open. Tibiae without dorsal preapical bristle.


The biology of this small family is little known. The larvae probably develop in the water-holding leaf bases of plants, particularly monocotyledons. The adults of some species often occur near water or at moist places and are closely associated with tussocks of large Carex species, others also with Typha, Scirpus or Cyperus. As in some Chamaemyiidae, the adults are able to walk sideways and backward with the same ease as forward.


families/brachycera/acalyptrates/stenomicridae.txt · Last modified: 2008/05/24 17:01 (external edit)     Back to top
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