Insects of the genus Ceuthophilus although widely distributed in North America are seldom encountered by the collector unless attracted and captured by means of Hubbell's molasses traps. These traps, which consist of glass jars (Hubbell recommends pint-size Mason jars) containing half an inch to an inch of molasses diluted one-half with water, are buried to the brim in the ground or heaped around with stones, leaves, etc., to give access to the edge of the jar. Hubbell recommends placing them “…at least ten feet apart, and where ground-cover is scanty…, near such as does occur” in habitats or situations which are expected to yield specimens of Ceuthophilus: almost any type of forest, rock piles, stone fences, vicinity of the openings of mammal burrows, caves, certain grasslands, etc….