Maclean 1966 Weather looked like it might clear, and soon did leaving a beautiful day - moderate wind, bright sun, etc. The adult diptera were flying in force all day. Went beyond village dump to area where first large tributary meets Nunivak Slough to make first stop. Stopped in the middle of a burst of Semi-pal activity similar to that seen Wednesday with Dr. Kessel. Collected four birds. Also a pair of red-backs - probably with young, in the area. Bumble bees and adult tipulids were evident. Failed to catch any bees, but began a tipulid collection for caloric determination. Spent time photographic flowers, of which there are more in bloom than near camp - 2 spp. Draba, 2 spp. Saxifraga, Papaver, 2 spp. Pedicularis, 2 spp. Ranunculus, Potentilla, and more. Followed Slough, as before, to assure a landmark as we drove further. Made a short stop, then a major stop about 7 miles from Barrow. There saw and collected a 07 white- rump. Diko found a remarkable concentration of collembolans resulting