Hemilo-chiapensis 63 Rio Fildstapac April 9 Tunice. Another time both species were together in the vines near the clearing. No signs of conflict -the birds apparently don't notice one another. The sphere of activity of the pair of chiapensis centered around the nest and the circle of amates surrounding the clearing. I never saw them cross the stream into the drier, shorter vegetation of guanuche trees where the 3 humilis were working most of the time. Another group of chiapensis sang from the veg. elation near the large burned over area and we saw these birds in the tall tangle of vines adjacent. Tunice I saw a lone bird in the dry tangle patch of acacia & shrubby trees near the tall guanacaste & vines, perhaps one of the birds of the second group. Humilis occurred as follows: 1. 3 birds with nest in the area to the SE of the stream - foraging in guanacoste & guanuchies near the nest, in the patch of guanuche in the streambed and also passing at least twice over into the amates surrounding the clearing and into the adjacent vines - thus overlapping the area frequented by chiapensis. They foraged there for long periods - most of the time high in the amates - often on the outer-most tango where they hung over like workmen and searched thru the leaves. Other times, they hopped along the branches and very frequently they worked up vertical or back-slanting tree-trunks, especially those of the