24 Oct. 26 En route to Ciudad Olveron and return. That city and with further help there from local residents, try to locate a good collecting site in the Yaqui Valley below Olveron. We left Olveron and travelled 56 kilometers to Colonia Irrigacion, in the direction of the coast line, where we were to find a series of lagunas in the vicinity of which suitable camp sites were supposedly to be found. Much of the valley is under cultivation, the main crop apparently being rice. A large portion of the valley is irrigated, and the area is a concentration center for waterfowl. We did not find any lagunas, and according to a local resident, the main duck flights had not occurred yet. Under these circumstances, it was decided that we would return to Olveron and head back for the Rio Yaqui proper with the hope of finding a campsite to the north of the rice growing area, between it and the Rio. We reached the Rio Yaqui after dark and spent the night along its shore. (See next page.) Oct. 27 In the morning we learned from local Mexicanos that there was no road south of the river and more or less paralleling it. We then returned as far as Vicam, with the hope of learning through a friend there, Mr. J. Dedrick, whom we had met on the train going south at Empalme, about roads and possible collecting sites on the