E.V. Miller 1940 Citellus variegatus April 1 2700+ ft. Arroyo San Bartolo, 7 mi. S Santa Catarina, Nuevo Leon, Mexico. In the early afternoon as I was coming down the canyon a large black and brown squirrel ran across my path and into some boulders before I could get a shot at it. The walls of the canyon were high and precipitous and the bottom stream with boulders and with a medium growth of cactus and several species of brush. Canyon wrens sang from the cliffs on either side and I shot a Callicer(?) Hummingbird and numerous ? Broad-tailed individuals of a species of Sceloporus. Several species of flowers were in bloom although the stream bed was dry in most places. The rocks appeared to be limestone and a dark gray harder kind. The cliffs were a very dark gray, in harmony with the dark color of the squirrel I saw. Yet the one I saw showed up strikingly because of his exceedingly dark and glossy pelage.