104. El Cayon Canyon, 3700 ft. E. base San Pedro Martirs Lower California, Mexico. June 4. Gilmore 1936 The side canyon contained a small trickle of water & numerous birds. saw a D.S. caetophila, a few auriparn Hornesp, numerous L.O. Vallesia Vone P. maculatus megalongx, several A.p. hesperophilus Ambhispira bilmeata Deserticlla, numerous Foreb belli pusillus M.C. omerascens & a few- C.O. darionensi. Up on the steep face of the ridge & on the top itself were the same Aeronautes melamolaeus darting about with marvelous rapidity. Two M.A. meamsi were seen flying along the very top of the ridge, The empty nest of a V.B. fusillus was found on the very top of the ridge in a palovate tree situated on a small mesa. There were quite a few Otellus among the rocks & rocky cliffs near the creek in the bottom of the side canyon. The Phomomp caught today was cought in a new set of working from the other two. So far three thonomy have been caught in three separated sets of daggings.