(Caterpillar) by the Butterfly House in Faust Park in Chesterfield, St. Louis County, MO. MO340 (Olive Blvd) NE 1.2 miles from jct with I64 exit 19 to the parking lot on the NW side of the road. (N38 39.880 W90 32.552) Photos by Jack & June Schmidt 8-28-10.