NOTES ON THE ODONATA, OR DRAGONFLIES, OF BUMP- 

 ING LAKE, WASHINGTON. 



By Clarence Hamilton Kennedy. 



Of Sunny side, Washington. 



The following paper is based on material obtained by the writer, 

 on July 10 and 11, 1911, while collecting mussels for the United States 

 Bureau of Fisheries. The specimens on which this paper is based 

 are deposited in the United States National Museum. 



Bumping Lake of the Cascades, which is called Lake Tannum on 

 the older maps, is in the west end of Yakima County, Washington, 

 at an elevation of 3,300 feet. It is roughly L-shaped, about 5 miles 

 long and one-half mile wide. Its outlet. Bumping River, empties 

 into the American River, which in turn empties into Naches River. 

 The Naches River is the main tributary of the Yakima River. 



Bumping Lake is a dark sheet of water hemmed in on all sides by 

 great somber firs. To one who sees it for the first time it is a striking 

 lake, for, while gazing across its quiet surface, with the lir-covered 

 slopes rising for a thousand feet from the water's edge, and above 

 these towering another thousand feet the rocky crags and snow- 

 drifted slopes of the higher ridges, a distant tanager's call echoing 

 through the firs breaks the silence, and one's impression is that of 

 solitude. This impression is further carried out in a study of the 

 fauna of the region, in most groups of which comparatively few 

 species occur, and these few occur in small numbers. 



The lake lies near the upper border of the Canadian zone. The 

 coney, great northern shrike, varied thrush, and white-winged cross- 

 bill of the Hudsonian zone are associated here with the coyote, pine 

 squirrel, and Louisiana tanager of the Canadian. As in other groups 

 but few species of dragonflies are found here, and but one of the four 

 found, a mountain or northern species, appears to be at home and 

 flourishmg. Possibly this scarcity in the case of the dragonflies is 

 due to some extent to the recent damming of the lake's outlet by the 

 Reclamation Service to hold back water for late summer irrigation, 

 for the lake surface is now raised each summer 40 feet above its 



Proceedings U. S. National Museum, Vol. 46— No. 2017. 



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