2 June. Camp Lowell Myiarchus sp? 9.9X4.1 8 6160 473 Dated To N.W. Henshaw 10x/4/2 8 6161 474 Microthene whitneyi 5.8x4.8 ♀ Obtained by falling a large cactus that stood in advance of the Stars near the valley. She was in a hole about 20 ft from the ground and with her were three young a few days old which I have fixed in alcohol. In the same cactus were nests containing respectively two each of C. aridopygialis, and C. chrysoideis, all nearly large enough to fly, some of which I shall skim. In one of the lower arms was also a nest, quite empty, that I believe to have been made by the above species of Myiarchus. I saw another in another cactus and also birds of the same sp. among the cacti. Let's Nat. Mus.