R.K.Selander, 1952 July 26 Camphylorhynchus jocosus agularis Rio Metzkitlan, 4000 ft., 20 mi. N Atotonilco, Hidalgo, Mexico. a higher pitch; less clear; lighter. On one occasion I watched and heard an adult make a song ---- a forced, awkward "oh - hee-lee -oo" or "oh- heelee - oh" - sounding a bit like the song the Agelaius phoeniceus, but much lower, less melodic, more nasal. - I note especially the fact that these wrens are less wary than C. brunneicapillus. When a pair is found, it is usually possible to obtain at least one of the two with the .38. After a shot, however, the other wren quickly retreat from sight and become silent. The Bewick Wren occurs in the cardon-marguete association on the slopes of the arroyo. There may be some competition between this wren and C. jocosus at the border of the arroyo-bottom vegetation and the cacti. Apparently, no other species wren is present in the arroyo -bottom. I have mentioned collecting this wren (C.jocosus agularis) in Nayarit. It will be interesting to see just how wide a habitat distribution these wrens have. Do they ever occur in cacti? I preserved a number of stomachs for food studies. I think they eat insects mostly as I have seen them foraging through the branches and foliage of the willow trees. I have pictures of this locality. These lost.