in zoology; a genus of insects belonging to the order diptera, the characters of which are: The rostrum is protracted, and jointed like a knee. The antennae terminate by a flat and solid articulation, resembling the bowl of a spoon, with a lateral bristle, which when closely examined appears to be very hairy. Of this genus, there are several species. 1. The calcitrans is to be found everywhere, especially in autumn, when it harasses the horses, and draws blood from them with its sting. 2. The macrocephala might at first sight be mistaken for a species of... Conovium wasp. It is smooth; the forepart of the head is lemon-colour, as are the poifers; the feet are dun-coloured. The thorax is variegated with black and reddish dun. The same takes place with respect to the segments of the abdomen; some of which are edged with lemon-colour, chiefly the second, and part of the third, towards the sides. The wings are brown, watered, and clouded. This beautiful conops is found in meadows. There are eleven or twelve other species.