Euthycera chaerophylli is a species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies.[1]
This species can be found in most of Europe and in the Near East.[2]
Euthycera chaerophylli can reach a length of about . 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.[3]
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.[4]