Valles, San Luis Potosi, Mexico to Mexico, D. F. June 29, 1946 Wires. At a point 42 miles south of Valles, a path of virgin jungle was noted, composed of large deciduous trees bearing epiphytic plant growth, and dense under-story vegetation. The country all through here was undoubtedly like this before it was cleared for agricultural and stock-raising purposes. 2 mi. south of Tama- zunchale, a small flock of Green Parakeets were seen flying above the road. 14 miles south of Tama- zunchale we crossed the San Luis Potosi-Hidalgo line. 18 mi from Tamazunchale, at 2000 feet, is still in tropical vegetation. At 22 miles south of Tamazunchale, 3900 feet, we noted a 10° F drop in temperature from the town of Tamazunchale. The trees appear to be of a larger growth form, and several trees resem- bling Liquidambar styraciflua were noted. Bananas were noted under cultivation by the roadside. 32 miles south of Tamazunchale, 4900 feet, several Spinus notatus were noted by the roadside. 36 miles south of Tamazunchale, 5900 feet, Ravens were seen flying by the roadside. 47 miles south of Tamazunchale, 5250 feet, the first Pines were seen by the roadside, and others were seen growing down the slope from the road. At this point a bright ♂ Tiaris olivacea was seen. The bird was singing from the top of a tree. His song was long being a fine, dry