R.K. Selander, 1952 55 Aug. 29 Rio Aguatillo, 900 ft., 11 mi. N = NE Aca pules, Guerrero, Mexico. Drove along Acapulco-Mexico City highway to its first (=only?) crossing of the Rio Aguacatillo. A rather broad, very shallow river (30-40 yds wide). Vegetation along river not unlike that along coast at Piede la Cuesta. Coconut palma planted in fields along the river. Also some broad-leaved trees of large size and lushy undergrowth. > Migrant reaction of Juveniles Doris reported C. jococus from here, but I saw none in a short hunt along the edge of the river. Did find a band of C. humilis foraging rather high in a large tree partly overhanging the river bank. Collected 2 juveniles. I would be surprised if C. jococcus occurred along the river as the vegetation is very similar to that of lower elevations where C. humilis occurs. However, C. jococus may inhabit the "monte" surround the river - consists of dense thorny trees (up to 30 feet) and vines. Returned to Pie de la Cuesta at 10:00, noting a Piaya cayana along the road in the "monte" vegetation. In the late afternoon we took a ride along the highway to Coyusa. The lowland vegetation of palm groves and fence rows continues for miles. Much of the "monte" vegetation of the foothills has been replaced into corn and other crops, although patches persist on many hill tops.