28. Mt. Popocatpetl, Mexico, Mex. to Chilpancingo, Guerrero, Mex. July 20, 1946 18 mi. W of Yantepec we reached Tlernavaca, el. 4100 ft. 12 mi. S. of Tlernavaca we turned off the main road and ate lunch at the exact location where Storer, Sibley and I camped for several days in 1941. Continued on over the Rio to Taxco, down to Iguala, and over the Rio de las Balsas, el. 1700 ft. Then up to Chilpancingo, el. 4100 ft. The country all the way from Tlernavaca to Chilpancingo is semi-tropical in nature, and apparently unfit for occupancy by Brown Towhees. At Chilpancingo, we stayed overnight at an auto court. After supper Chuck and I called on Mr. and Mrs. W.W. Brown. We had visited them in 1941 at the Hotel Mexico, where they are still living. Mr. Brown has been in Chilpancingo 9 years now. He remembered us well from our previous visit. I asked him if he had ever collected Brown Towhees during his 9 years in Chilpancingo, and he said that he had taken one male by the river about 1 mile out of town. The specimen is now in the collection of the late Milton S. Ray. Mr. Brown seems keen and enthusiastic, but his wife is in very poor health and is completely immobilized. July 21, 1946 Left Chilpancingo at about 8 a.m. and drove west into the Sierra Madre del Sur to trail-