MooHK AM) Ih xgerford: Water Insects. 419 



LAST CHANCE CREEK, EASTERN KANE COUNTY, UTAH. 



In ;i pnrt of the sandstone canyon of Last Chance, about twenty- 

 five miles :il)()\-e the point where it flows into Colorado river, a 

 small stream Hows more or less permanently. Other parts of the 

 canyon contain intermittent flow, but in most cases, except for 

 occasional groups of Gerris remigis, did not contain other observed 

 water bugs. At the place described, a group of small dytiscids, a 

 number of MicrovcUa and some gerrids were collected. 



SPRING ON PARIA RIVER, ABOUT FIFTEEN MILES BELOW CANNONVILLE, 



KANE COUNTY, UTAH. 



Most of the lower Paria river, the main stream in south central 

 Kane county, Utah, is dry the greater part of the year. The river 

 has carved a very deep sandstone canyon, which affords the only 

 passageway from north to south across this part of the country. At 

 a point about fifteen miles below the town of Cannonville, the last 

 settlement on the southward route to Colorado river, at Lee's Ferry, 

 about seventy-five miles distant, is a fine spring. The flow is fairly 

 large, as compared with other springs in this country, and the water 

 is clear and not alkaline. 



A host of Gerris remigis and Trepobates pictus were found on the 

 water of the spring. 



LOWER ROCK CREEK, EASTERN KANE COUNTY, UTAH. 



Water fl.ows more or less permanently in the lower part of Rock 

 creek, the easternmost of the longer, deep canyons tributary to Colo- 

 rado river west of Kaiparowits plateau. The canyon of Rock 

 creek, as the name perhaps suggests, is somewhat unusual, even 

 among the great, bare rock cliffs and canyons of the plateau coun- 

 try. Its walls and bottom are mostly composed of naked rock, and 

 sculpture by running water has produced an almost indescribably 

 rough topography. 



The stream at the camp site of the writer, about two miles above 

 Colorado river, contained numerous Microvelia and a few gerrids. 

 No other water bugs were observed. 



NEAR GOODRIDGE, SAN JUAN COUNTY, UTAH. 



In a small, isolated spring, about one foot in diameter and a few 

 inches deep, were taken three Notonecta insulata Kirby. No other 

 water insects were present. This tiny basin of water was three miles 

 from the swift, muddy San Juan river, and there were no other near 

 water sources known. The location of tiie spot is at the west side 



