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Tethinidae

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Classification

BRACHYCERA, Muscomorpha Schizophora Acalyptratae, Carnoidea

Number of British species: 10

Size: T-S

Difficulty: 3-4

Characters

Minute to small (1.5-3.5 mm), yellow to black flies with a grey, yellowish, or brownish pruinosity. Arista bare to short pubescent; ocelli present; Ocellar bristles present; Postvertical bristles converging; 1-5pairs of frontal bristles, the upper ones curving outward or backward, the lower pairs, if present, curving outward, forward and/or inward; interfrontal bristles present or absent; vibrissa-like bristles present, in some cases small and inconspicuous; in the subfamily Tethininae a small lustrous bulge in between the antennae and the anterior vibrissa-like bristle. Wing unmarked, with a pale yellow to brownish tinge; Costa with a subcostal break; vein Sc first running parallel to and then merging with R1 just before the costa; crossvein BM-Cu absent or very faded; cell cup present but small. Tibiae without dorsal preapical bristle.

Biology

Tethinidae are almost exclusively halophilous flies, mainly found along the coast although they occur in saline inland habitats as well; only a few species are also known from habitats that are apparently without increased salinity (forests, meadows, deserts). They are often present in great numbers. Some species are recorded from secondarily man-created habitats, such as meadows polluted by industrial emissions, slaughterhouses and poultry farms, where they live synanthropically in alkaline damp places.

Identification

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