R.K. Selander, 1954 C. chiapensis 13 March 22 3 mi. SSW Tonala, 100 ft., Chiapas, Mexico As if the presence of a large tree such as a mango is [illegible] important in determining the presence or absence of wrens. The nests do not appear to be placed in these large trees, however (see exception back a page or two, however) but rather in ocociss or other thorny trees at the edges of clearings. Bul-lon acacia is the usual nesting tree. Height of nest placement varies from 7 to about 15 feet above the ground. We found no evidence of humilis or nigricaudatus today in the vicinity of our camp although we hunted rather thoroughly through the drier, lusher, or stands of vegetation. Neither of howli's deoyhas brought in these species to date.