616 Characteristics of the Insect-Fawia 



at their junction with Mount Washington, there is formed 

 a broad, far-reaching plateau, sloping gradually away to 

 the south, where the subalpine region enjoys its widest 

 boundaries, whose southern limits I have not fully traced, 

 and the representation of which on the map may be 

 faulty. Within this subalpine region, which includes also 

 the head of ravines, there are several ponds or tarns of 

 small extent : one in Kine's Ravine, the deep gap between 

 Mounts Madison and Adams,* at the height of 4912 feet; 

 several small ones between Adams and Jeflerson ; two 

 deeper ones, known as the Lakes of the Clouds, the 

 sources of the Ammonoosuc, lying at the base of Mount 

 Monroe on the side toward Mount Washington, at an 

 elevation of 5009 feet ; and other small ones at the south- 

 erly base of Monroe. The alpine region of Mounts Ad- 

 ams and JefliVrson merely encircles their summits, while 

 that of Mount Washington pushes northeastwardly along 

 the ridge which extends in that direction, occupying one 

 or two successively lower plateaus, and is carried also 

 southwardly, upon the opposite side of the mountain, 

 over the upper portions of the widely extended plateau to 

 the south, known as Bigelow's Lawn, but scarcely reach- 

 ing so far as the Lakes of the Clouds upon the one side, 

 or the head of Tuckerman's Ravine on the other. 



Some thirty-five years ago, Say, in the third volume of 

 his American Entomology, described and figured a species 

 of Chionobas under the name of Hipparchia semidea, from 

 specimens sent to him by Mr. Nultall and Dr. Pickering. 



* There is a slight confusion in the ntimes applied to the mountains by Prof. 

 Guyot in dilTerent parts of his table of their heights, (Sillinian's Journal, XXXI., 

 182,) the names of Adams and Jefferson being interchanged; in his Map, he has 

 followed Prof. Bond's very common error in calling Adams, Jeflerson, and vice 

 versa. The name of Adams was originally applied to the northernmost and higher 

 peak of the two. See Prof. Tuckerman's article in Rev. Mr. King's book on '' The 

 White Hills." 



