Temescaltepec, Mexico, Mex. to Jacahu, Michoacan, Mex. July 30, 1946. Rio Temescaltepec out to the NE-SW Valley which is walled off at the N End by Volcan de Toluca, and on the E and W by high, coniferous ridges. The Rio Temescaltepec flows E+W at the point where it enters the Valley, and the Jorokees undoubtedly follow it in both directions, both above and below Temescaltepec, although How far I cannot say. Volcan de Toluca Rio Temescal-tepec Real de arriba I = 2 1/4 mi. Temescal- tepec To the Rio Balsas According to the American Geographical Society map, there is a Valley running from the Valley of the Rio Temescaltepec NW towards Zitamaro, and there is a possibility that the birds may follow it and join the population which stems from the Valley of Mexico South. At any rate, there seems no other connection between this population and the outside, as they probably do not follow the Rio Temescaltepec to the Rio Balsas, which