K. Selander, 1954 25 SE Tonala', Chiapas, Mexico March 25 the remaining trees in the valley and along the base of the hills are of good size in many cases — on the hill to the North the forest extends only about half way up, then becomes thinnier and finally the summit is almost bare of vegetation. It will be important to determine whether breviceps or nigricaudatus inhabit this forest in its undisturbed condition. If so there is probably a fairly good connection between pop- elations of the two — if not then they may have only very recently come into contact as habitat was made available when clearing of this valley was undertaken. We drove on to what one man at a posta told us was the Rio Palca. This was at a point 36 mi. (by road) from Ocuilapa. He claimed that La Polka was only 4 km. distant and that Tres Picos was 16 Km. farther along the road. (The posta was .8mi. beyond the Rio Polca. This man said chevenacos are rare around his place but said that they are common around Tonala'. The high, sharp peak on the N edge of the range blanking the Laguna on the SE he called Pico or Cerro Vernal. We saw no chifarencio today. They must be rare in this valley, especially in the SE portion. Noted many of some lizards around Tonala' — the only