an arrondissement of the department of the Upper Pyrenees, in France, 770 square miles in extent, comprehending ten cantons and 202 communes, with a population of 73,630 persons. The capital is the city of Bagneres de Bigorre, celebrated for its medicinal springs. It is at the entrance of the beautiful valleys of Medouse and Campan on the Adour, and is much frequented both for health and pleasure. The population is about 6500. Long. 0. Lat. 43. 3. N.