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althoU&h several vere causht in the slover azd shallower water oft the sandbar west of the cabin. Some of the bonytails had red-oranse coloring along the sides and on the pelvic tins. Channel catfish and carp were taken throughout the collect ins area in all types ot water. Invertebrate collection. By tar the largest numbers of insect larvae were found clinging to pieces of limbs and sticks partially buried in the sand on the river bottom. Mayfly larvae were the most numerous" but caddisfly larvae, and one damselfly larvae vere taken trom sticks also. Several dragonf'ly larvae were found burrowing in the sand of the river bottom. l-laterboatmen, ba.cksvimmers, and one vrater beetle were found in cut..oU puddles. Fish were preserved in 10~ formalin and invertebrates vere preserved in alcohol. ECiID PARK July 29, 1962 River level stayed the same since 7:30 p.m., July 26. Time: U:30 a.m.o" Green River .. pH., 7.5. D.O., 1.7 p.p.m. Water temperature, 69.5 F. phth., 9 p.p.m. M.O., 151 p.p.m. Heather, partly clOudy, calm. Time: 5:15 p.m. .... Yampa River. pH, 7.5, D.O., 7.8 p.p.m. plIth., 0 p.p.m. M.O., 141 p.p.m. July 30, 1962 River level stayed the same since last recording. Time: 9: 50 .. Green River. pH, 7.5. D.O., 7.8 p.p.m. water temperature, 67. 50F. phth., 10 p.p.m. M.O." 158 p.p.m. Vleather, clear;- calm. July 31.. 1962 River rose about i inch since last recording. Time: 9:45 a.m.- Yampa River. pH, 7.5. D.O'I 7.8 p.p.m. Water temperature, 69.0eF. phth..J 6 p.p.m. M.O., 146 p.p.a. Time: 11:20 a.m.- Green River. pH., 7.5. D.O., 7.7 p.p.m. l-later temperature, 09. 5ur. plIth., 6 p.p.m. M.O., 121 p.p.m. Weather, clear, calm. August 1, 1962 River dropped about 1t inches since last recording. Time: 12: 30 p... rampa River. pH, 7.5. D.O. 7.8 p.p.m. Hater temperature, 72.001. plIth., a p.p.m. M.O., 127 p.p.m. Weather.. clear, calm. Time: 2:15 - Green River. pH. 7.5. D.O. 7.8 p.p.m. l-later temperature, 72.0uF. plIth., 10 p.p.m~ M.O., 133 p.p.m. Heather, partly cloudy, w1ridy. Took one northern bluehead mountain sucke:r in a gill net by ranser stat ion. It was about 9 inches long and was taken in an area where the Yampa and Green River water had not com- pletely mixed. It was taken in the more clear Yampa water. -18-