Trombidiidæ (trombidiide)

pl. (Leach, 1814, as Trombidides ), of the world. Trombidium fasciculatum of the East Indies, one third of an inch long, is the largest acarid known. The Trombidiidæ are strictly predatory in the adult stage, but their larvæ, although originally no more parasitic than a gnat or a leech, will yet attach themselves to the bodies of animals, or even to man himself, and are usually sep a rated only by death or artificial means, causing consider able irritation while present. Some are known by the name of harvest - bug in England, and rouget in France, being the Leptus autumnal is of earlier entomologists.