Euthycera chaerophylli

Euthycera chaerophylli is a species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies.

Distribution
This species can be found in most of Europe and in the Near East.

Description
Euthycera chaerophylli can reach a length of about 10 mm. This fly has a slender body. The gray thorax shows 4 lines of brown spots. The prominent eyes are reddish. The head is yellowish. The yellowish antennae are forward-pointing. The wings are mottled with greyish spots.

Biology
These flies are univoltine and overwinter in the puparia. The larvae develop in slugs. They develop inside body of the host (endoparasitoids), mainly Deroceras species.