The U.S. Equestrian Federation has named four horse-and-rider combinations to represent the United States at the CSIO-W Buenos Aires in Argentina, Nov. 6-11.

With Norman Dello Jolo serving as chef d’equipe, the following riders will compete in the Nations Cup on Nov. 9:

• Charlie Jacobs, 41, of Boston, Mass., will ride CMJ Sporthorse’s Flaming Star, a 13-year-old Irish gelding, and Deeridge Farms’ Leap of Joy, an 11-year-old Holsteiner gelding.

• Quentin Judge, 26, of Wellington, Fla., will ride Double H Farm’s HH Carotino, a 10-year-old Holsteiner gelding.

• Catherine Pasmore, 20, of Wellington, Fla., Pasmore Stables’ Z Canta, an 8-year-old Dutch Warmblood mare.

• Alison Robitaille, 33, of Upperville, Va., will ride Diana Firestone’s Cover Girl, an 8-year-old Wurttemberger mare.