83 Tres Picos, Chiapas, Mexico April 12 miles at least I should judge. I remember that Drly Davis mentioned the presence of chiapensis and nigricaudatus at Tres Picos. It would be very strange if chiapensis did not occur here - the large trees all considered. What the distributional situation is with chiapensis and nigricaudatus we did not determine as we were able to hunt for only 20 minutes before catching the Tapochula-Tonalá train back to Tonalá. Just before we entered Tres Picos we crossed a wide, dry river bed - probably the Rio Oronoz?? Nigricaudatus would have a good path for dispersal to the Oxvilaba Valley along this river from the Tres Picos region. Certainly, the main avenue of dispersal is through the valley and not along the narrow plain adjacent to the Laguna. Took several black & white photos of Tres Picos region Black & White Roll # 15.