Coggswell 1949 Iridoprocne biislar Aug. 7-17 Big Lagoon, Humboldt Co., Calif. Common in about the wet pastured grassland, over the marsh, and in openings of the Spruce-alder or Dipherum woods. They were also noted in the open bend of Maple Creek 1 ½ miles in from the lagoon, which is in the 3-year old burn. Many immature birds were evident among those near the marsh. One was collected on Aug. 10 at the 3-year-old burn. Aug. 22 2 ½ mi. NW Schoolhouse Peak, 200ft, Humboldt Co., Calif. about 5 individuals were seen among other swallows & many swifts flying over grain & stubble fields. No others were noted during our weeks work in the Schoolhouse Peak to French Camp area.