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devoted special attention to securing these insects. It may be 

 well, by way of introduction, to give a brief account of the 

 localities visited, as Mr. Schwarz and Mr. Barber have described 

 them to me. 



The last week in May and the first two weeks in June were 

 spent at Williams, as well as the last of June and several days 

 in July before and after visiting the Grand Canyon. Here a 

 small stream flowing down from Bill Williams Mountain had 

 been dammed in several places to furnish water for the saw-mill ; 

 thus a number of good sized ponds or small lakes had been made, 

 and along the shores of these, and of another pond on a small 

 stream about a quarter of a mile distant, the dragonflies were 

 taken. Mr. Barber tells me that these streams had dried up be 

 fore he left Williams, leaving water in the ponds only. The al 

 titude of Williams is about 6700 feet. 



Flagstaff, with an elevation of 6,940 feet, had a permanent 

 supply of running water. Otherwise the country was much like 

 that of Williams. Here about a week was spent and Odonata 

 were collected along an open sewer of running water, and also 

 at a reservoir situated about three miles from the town. 



At Ash fork the country was extremely dry everywhere and 

 the only water to be found was a small pond of waste from the 

 railway engine tank, although the dry bed of a creek indicated 

 that there had been water there at one time. This place has an 

 elevation about 1,000 feet less than that of Williams. 



Hot Springs, in Yavapai County, about fifty miles north of 

 Phoenix, proved a most interesting collecting ground, and many 

 new and rare species in various groups of insects were captured 

 here. At this place the new species of Ischnura was found. In 

 the "four tanks," a succession of large water-filled potholes in 

 the rocks, a number of interesting dragonfly larva? were obtained, 

 while adults of various species were flying over a small stream 

 fed by the hot springs. Near the hotel were several fountains of 

 tepid water piped from the springs, and around these all the speci 

 mens of Telebasis salva were taken, while Argia violacea, variety 

 pallens, occurred along a sewer leading from the buildings. The 

 altitude of Hot Springs is about 2,300 feet. 



Within the Grand Canyon nearly all the specimens.were col 

 lected along a spring-fed stream, about a foot and a half wide and 

 six inches deep, lined on either side by willows and tall, coarse 

 grass. The spring is situated about 4,000 feet below the brink of 

 the canyon and some 2,000 feet above the river. Mr. Barber 

 descended the canyon to this point on two successive days for the 

 purpose of making collections. Here, among other species, he 

 found the Mexican Hctczrina vulnerata and Cordulegaster dia 

 dem a. 



Mr. Schwarz tells me that swallows and dragonflies are the 



