probably a most ridiculous conclusion. The story of the birds on Mono is rather sad. In our entire stay with all four of us working all the time, only two species of small birds were collected, the black fantail and the yellow honey- sucker. It is a large bird island. The minors, pigeons, parrots, hawks, blackbirds, and cockatoos have evidently left no room for anything else. One common brown dove, because of its local rarity, was the most interesting bird we found, aside from a single graybird shot by Dr. Drowne. We covered all the ground in the neighborhood of the ship as well as the bush from the village to the height of 1100 feet, along the rim of the extinct volcano. But there was not a sound save for the occasional crash of a rotten tree. The most attractive part of our visit to make up for our bad days of shooting was in exploring the rivers of Mono. The island has a geologic construc- tion which is very complex. That is it changes ever so often from a hard igneous bed to a soft clay-like bed. The water drainage therefore passes through a varied declination, forming itself into odd waterfalls, half-hidden water pools, caves, and overhanging grottos. Following the course of one of the several rivers is an unending series of pleasant surprises, passing some particular spots where the association of foliage, mosses, caverns, and pools wind themselves into sorts of fairy bowers. Several places appeared to have been