E. Hieke 1982 Journal Vicinity of Cañas, Guanacaste Prov. Costa Rica July cont lots of cattle trails criss-crossing the hill side. The patches of forest appear as islands on the landscape, and even the ones that look mature from a distance probably have cattle- sign + show a lot of dense secondary growth. Finished setting line ~ 1730. Duke + Phil each set trap lines at a different patch 3.8 km NE of Cañas. Duke saw a Potos in the trees there. There are also howler monkeys present (Alouatta) - Phil saw them, I could hear them later when we went back to the site. I looked for the Potos but didn't find it. Earlier today we saw a Sciurus variegatoides run across the road - new species for the trip (somewhere S. of Cañas....) Ate dinner in Cañas and camped in an old gravel pit just NE of town. Heard coyotes howling before we turned in ... A warm, windy night - rain unlikely. We spent the evening stuffing the skins of mice karyotyped yesterday. Cañas to Tilaván, Guanacaste Prov. Costa Rica 22 July Arose ~ 0630. Clear, sunny, warm. Some kind of insect bit the hell out me last night and I'm covered with welts. Traps only yielded 3 Liomys salvini - one caught in secondary, 2 in forest. Several traps empty of bait but not closed (ants?) Duke + Phil cought 7 Liomys each. They said that they were