Chamaemyiidae

A family of about 200 species in the suborder Brachycera. Their grey larvae are predators that prey on aphids and scale insects. Members of the genus Leucopis were used to control pests in these groups.

Website: https://www.google.co.il/search?q=Chamaemyiidae&biw=1280&bih=687&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiiiY2MveLJAhUCwxQKHcCKC8gQsAQIGw&dpr=1.5 –