86 Tonalá to Arriaga April 14 ends at about 3.5 - 4 mi. NW Tonalá. 5.3 mi. NW the dirt road takes off to the place where we found chickenensis and humilis together early in the trip. At 6.6 mi. a big dry stream crosses the highway - toto paxo is dominant tree along stream. We heard the song of humilis here. At 9 mi. NW we stopped at the rancho Juan and I walked up on the dry hill which is close to the road and collected a set of typical plants. I found our singing wren is the understory beneath quanoacaste trees in an arroyo at the base of the hill. The bird sang several variations - "Put - cha - weet, etc. - Pi'tui, first pi-tui, etc., and we-dwit, we - doit. I saw no wrens on the hill where 1 1 the is a dry forest from 10 - 40 feet high. Half or more of the trees are totally deciduous. A few others such as the toto paxo (bush-like) are in leaf. On the hills the trees are rather widely spaced but in arroyos the vegetation is dense. There is only a single stratum of vegetation. Only bird seen was white-winged dove. Some BHA. This "forest" may be OK for humilis when the Q trees are in leaf but there are no wrens in it at this time of year. Noted clusters of grapes on a peculiar vine. Some of the elements are the same as found down on the plain but they are smaller in the mountain and some of them are semi-deciduous. Some elements