AQUATIC INSECTS IN THE ADIRONDACKS 385 



experiments, in making quantitative studies of the life of certain situations, 

 in gathering the materials for the study of the natural and habitual food 

 of trout, bullfrogs, and some of the larger species of dragon flies, in run- 

 ning trap lanterns and sending their nightly catch to the state museum, etc. 

 Besides three official visits made by Dr Felt during the course of our 

 session, our station was visited for a week or more at a time by three 

 scientific friends, who, while there, participated in our operations, and, 

 while collecting for themselves, gathered also valuable materials and 

 information for us. These were Louis W. Swett of Maiden Mass., H. N. 

 Rowland of Austin 111., and Dr O. S. Westcott of Chicago. It is a 

 pleasure to acknowledge the assistance gratuitously rendered by these 

 gentlemen. 



Biologic features of the locality 



As is well known, the Adirondack region of northeastern New York 

 is an extensive area of forest, having an average elevation of about 1800 

 feet. Its eastern half is covered with a succession of low mountain 

 ranges, whose general n n e-s s w trend is indicated on the accompanying 

 map (map i) by the trend of the streams which occupy the narrow 

 valleys between them. The western half is a region of lakes and swamps 

 and bogs, with scattered mountains and hills and. ridges. 



Map I shows the principal streams that participate in the drainage of 

 the Adirondack region, the principal lakes, and some of the mountains. 

 It will be observed that the lake region of the Adirondacks is drained 

 principally through Racket river into the St Lawrence. 



Saranac river is the only one on the Champlain side that drains any 

 considerable part of the lake country. Our station at Saranac Inn was 

 at the head of the Saranac drainage system. Map 2 shows the 

 immediate field of our operations. As stated above, the hatchery was 

 our working headquarters. We did more collecting from Little Clear 

 creek right on the hatchery grounds than from any other equal water 

 area, and obtained more material of value there than in all other places 

 combined. More or less regular collecting was done, however, from the 

 three propagating ponds. Little Clear, Little Green and Bone, and from 

 Little Bog pond, southwest of the railroad station. Two collecting trips 

 were made to each of the following places: Colby pond, at the western 

 outskirts of the village of Saranac Lake ; Stony brook, just north of 

 Axton; and St Regis pond, at the end of the carry from Little Clear. 

 The mornings and evenings of the first week of the session were spent 

 gathering material about the south shore of Lake Clear, or Big Clear at 

 Otisville. 



