Helina evecta

Description

This is a common muscid fly with a pale brown or blue abdomen with dark spots. It has infuscated cross-veins on its wings. It requires microscopic examination to be certain of identification. One identifying feature is the presence of long, dark hairs on the lateral margins of the scutellum and also the length and density of hairs on the hind femora (see ID Aids).

Similar Species

It cannot be reliably separated from H. annosa without detailed examination - see ID Aids below.

Identification difficulty
ID guidance
  • Setae on underside of hind femora only on apical third
  • Hypopleuron sparcely hairy below spiracle
  • Four postsutural dorsocentrals
  • Legs all black
  • 2+2 sternopleurals
  • Hairy eyes
  • Fine black hairs on margin of scutellum
  • Cross-veins dark
  • Arista plumose, long hairs all along the dorsal surface, but with longer hairs on the ventral surface only in the apical half
Identification aids

It cannot be reliably separated from H. annosa without detailed examination. The setae on the underside of the hind femur are a key feature. In H. evecta these are restricted to the apical third and long (more than the width of the femur). In H. annosa they extend along the length of the femur and are shorter (up to the width of the femur).

helina

 

Habitat

Various.

Life History

Larvae are found in humus soil and moss.

UK Status

Common and widespread in England and Wales, fewer records from Scotland.

VC55 Status

Common in Leicestershire and Rutland.

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Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map