Moore and Hungerford: Water Insects. 417 



"tank" on COLORADO RIVER AT WATER POCKET FOLD, KANE COUNTY. 



This was located on the north bank of the Colorado river near the 

 mouth of a small tributary canyon at Bennett's oil camp, where 

 Water Pocket Fold crosses the canyon of the Colorado river, about 

 eight miles above the mouth of Escalante river, eastern Kane 

 county. A pool of clear rain water filled the depression in bare 

 sandstone, about four feet wide, five feet long and two and one-half 

 feet deep; no vegetation around the pool; about thirty yards from 

 Colorado river, a swift, muddy stream, very unlike the water in the 

 "tank"; unknown distance to adjacent pools of clear quiet water; 

 elevation about 3,500 feet. Here were taken: 



Fifteen Arctocorixa abdominalis Say, four males, eight females 

 and three nymphs. This represents the farthest north record for 

 the species, which was described from Mexico and reported from 

 Texas and California by Uhler. 



One Notonecta insulata Kirby, female. 



Two Thermonectes marmoratus Hope, one male and one female. 

 The capture of this beautiful dytiscid appears to be a new record for 

 the state. Leng's catalogue records it from Arizona and Lower 

 California. 



SPRING OPPOSITE OWL CAVE, HARRIS WASH, GARFIELD COUNTY, UTAH. 



About twenty miles southeast of the little town of Escalante, 

 eastern Garfield county, Utah, a permanent spring is found in the 

 sandstone wall of Harris canyon, which is tributary to Escalante 

 river. The fiow of this spring is not large, but the water is of excel- 

 lent quality, and, as natural shelter is conveniently near at hand in 

 a large sandstone caveYn, Owl Cave, the spot is a camping place for 

 most of the few travelers who pass this way. The water from the 

 spring irrigates naturally several square yards of protected ground 

 adjacent to the spring. A beautiful little meadow, therefore, has 

 been formed, through which the water flows a short distance before 

 sinking into the sand. 



This spring and short stream support a populous community of 

 aquatic insects and other life. However, only two species of water 

 bugs were observed, Gerris remigis Say and Trepobates pictus Uhl. 



SPRING IN WATER POCKET FOLD, CIRCLE CLIFFS, GARFIELD COUNTY, 



UTAH. 



One of the very few water sources in the northeastern side of the 

 Circle Cliffs is a small spring, from which the water flows a few 

 yards before disappearing in the floor of a canyon tributary to 



