Euthycera chaerophylliEuthycera chaerophylli is a species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies.DistributionThis species can be found in most of Europe and in the Near East.DescriptionEuthycera 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.BiologyThese flies are univoltine and overwinter in the puparia. The larvae develop in slugs. They develop inside body of the host, mainly Deroceras species.