Very erratic in their movements

J. E. Taylor, The Playtime Naturalist, New York, D. Appleton and Company, 1889, p. 149-150.

The bottoms of the ponds and streams visited during the long sunny mornings were seen occupied by slowly moving objects, which, how-ever, were any very erratic in their movements. The greater number of them looked like animated sticks; some were clusters of minute Planorbids and other fresh-water shells. An examination showed them to be diferent species od caddis-worms, the aquatic larva of the Ephemeridae, or may-flies.