Pt. Barrow, Alaska July 31 Large swarms of chironomids of apparently 2 spp (in separate swarms) formed behind ARL this evening following the overcast which moved in. Swarming commenced shortly after 6 p.m. and abated by 2200 as temperature fell. They were insipicuous over most of the level grid behind ARL in camp and down at the sears. John Mohr U.S.C. said they continued to fly individually up to 0200 and were observed in flights over the ocean. Plankton samples by him about 1/4 mile out yielded chironomids in water. No mosquitoes were encountered during my period of observation. August 1 Afternoon m ridge - overcast with thunderstorm to 5 which eventually moved into area of base etc by 1800 with rain - last peal of thunder was at 1800. Wind at m ridge was variable sometimes more at its maximum, was at 13:30 $10 knots from West. Rain continued from 1800 until now 2200 + is still coming down. Not significant