Macroxyela ferruginea.—Larva is about 1.5 cm. long and caterpillar-like, green with yellowish-white markings, prolegs on every abdominal segment, anal area smooth and concolorous with the body antennæ six-jointed. Feeds on Ulmus mericana.

Head green; antennæ green, except three brown distal joints and a brown ring around the middle of the second and third joints; mandibles rufous at the tips; ocelli black. Body green, with the following parts yellowish-white; two dorsal strpies, a substigmatal line extending along the substigmatal fold of skin from the head to about the third or fourth abdominal segment and the tubercles; a ventral line of pearly white extending from head to 4th abdominal segment.