R.K. Selander, 1954 36 C. chigfanae's nigricaudatus 3 mi. SSW Tonalá', Chis., México March 30 Dearly flycatchers taking material from nest #1. Bonnie is now not sure that she saw the wrens building at this nests and thinks that they may only have been perched on it. " ow ?-chua-cha, ow y-chua-cha, ow-'chua chaw given loudly by a single bird in bushes near nesttree, "ow-'chu-suga, ow-'shu'suga" same bird, this time 2 a 4 note song. Collect the bird (#1854) after it had called in trees near the nesttree for about 10 minutes. It was seen to forage at medium heights above the ground but called rather often - perhaps attempting to locate or contact the pair I had collected earlier. This bird was seen to visit the roost nest once, one when this bird sang another group answered from a distance. Collected another lone bird in tree near our tent (#1855) March 31 Moved from camp in morning and drove SE of Tonalá to a point 5.3 mi. beyond Rancho Ocuilapa where we made camp off the road in the yard of the Rancho Oronoz on bank of Rio Oronoz. People here say we are very close to La Barita and that the Rio Oronoz flows SE of the Cerro Meral (ie. not into the Laguna. Just before arriving at camps we climbed a little and are now at the edge of the NE range of hills we have been following. Will get a better description of the area tomorrow. The vegetation is rich along the river but quite