Soyourus soya 8 June Peters-Schroder L. - one was seen and heard singing on a sandstone cliff 24# mi up the creek bed above the large fan SE side Schroder. An old nest was visible under an over- hang on a ledge - much white chaffings around it. 9 June Peters-Schroder L. - one seen flying about works on east side of valley just south of lvl of Peters L. 14 June Peters-Schroder L. - in Phoebe Meadows - adult on the nest site previously found - flew away at my approach. Neither - feathered - 2 eggs present. Nest is 2 cup built on a compact layer of moss with a little mud added to it or possibly taken incidentally. The rim of the cup and peel of dittmar mound was lined with teased material from Lepidopterous pupae - cucumbers, Then in the cup came a layer of dead sheep hair also firmly compacted by the vert of the cups wool train and finally the eggs were lying on an inner lining of ptarmigan feathers. A very firm nest blending weight into the rocks.