The minute creatures move rapidly and gracefully and make long, daring leaps. In running over the leaves and branches they follow the lateral stems, and on reaching the ends ascend through the tree-top or thick foliage by leaping crossways from twig to twig, as if ascending the rungs of a ladder. I kept one that was given to me by the natives as a pet for some time. It made its home in the pocket of my flannel hunting-shirt, where it was always sure to find a bit of cracker or sugar, and to which it could retreat when frightened. Whenever anything of an unusual nature occurred, the bright, inquisitive little eyes always appeared suddenly so as not to miss a single thing that might be of interest. It never attempted to bite or run away, and seemed perfectly contented with the company of the friends that fed and protected it. Eventually we started back toward Popayán. We crossed the high brush-covered divide July 4; a violent electrical storm had been staged on the wild mountain-top as if in noisy celebration of the day. It began with a dark mist that covered everything. Then rain and hail fell uninterruptedly for more than an hour, while lightning flashed and blue-green flames seemed to leap toward the blackened rock. Sometimes the bolts came from above, and again they were below us so that we were enveloped in a weird, ghastly light. The thunder was terrific and kept up a continuous crash and rumble. It was impossible to see any other member of the expedition on account of the thick haze--there was no shelter of any kind--only the narrow shelf-like trail that snaked its way along the steep slope. After the storm we made camp; the men and mules kept straggling in until a late hour; they were very wet and much bedraggled, but apparently none the worse for the nerve-racking experience. Popayán was reached without further incident. Richardson’s contract having expired, he determined to leave the country, so we returned to Cali to rearrange the equipment and pack the collections; then he left for Buenaventura to take a north-bound steamer. In the meantime Doctor Chapman, who had reached New York, arranged to send down a man to fill the vacancy left by Richardson. Doctor Arthur A. Allen, of Cornell University, was selected for the place. He reached Cali about the middle of August and accompanied me during the succeeding eight months. In compliance with instructions received from Doctor Chapman, I immediately planned an expedition northward, then toward the east to make a zoological exploration of the forests bordering the Quindio Pass and of the high paramo of Santa Isabel. The first stage of the journey was down the Cauca River.