REPORT OF THE STATE ENTOMOLOGIST I907 157 
of his study of these insects are reserved for publication in a sepa- 
rate bulletin. I studied mainly stone flies. The results of my work 
on this group I have reserved for a future bulletin. The largest 
present gaps in the knowledge of the immature stages of aquatic 
insects will be filled when these two groups are reported upon; but 
since these are omitted from present consideration, it is only some 
supplementary studies the results of which are included in the 
present brief report; namely, some additions to our knowledge of 
Ephemeridae and Diptera and some new studies a the food and 
foraging grounds of fishes. ‘ 
Localities and methods 
Old Forge, as is well known, is situated at the outlet of the Fulton 
chain of lakes. It has about the same altitude as Saranac Inn (a 
little more than 1700 feet) and is like the latter place im being 
surrounded by low densely wooded mountains and hills with lakes 
and ponds occupying valleys between; but it differs in some minor: 
particulars affecting its fauna. It is on the St Lawrence side of 
the Adirondack drainage system, while Saranac Inn is on the Cham- 
plain side [see accompanying map]. It is at the outlet of a chain 
of lakes where a small river breaks into-rapid descent over rocky 
beds, while Saranac Inn is at the head of a similar chain where 
streams are slow and sinuous, with sandy beds and sphagnum bor- 
dered banks. The differences in fauna are not very marked. Old 
Forge is richer in the species that live in rapidly flowing water, 
having an abundance of stone flies and current-inhabiting caddis 
flies. Saranac Inn is richer in lake and pond species, especially in 
dragon flies. We collected chiefly from Moose river and Old Forge — 
pond because of their proximity to our laboratory, and from Bald 
Mountain pond and Beaver Meadow brook because of their very 
fine faunas. .The characteristics of our collecting grounds are 
worthy of more detailed statement. 
Moose river. The hatchery being located directly upon the 
bank of Moose river [pl. 4] and a stone’s throw below Old Forge 
pond, we naturally visited these bodies of water most frequently. 
Moose river was disappointing. Often in passing on the old Adiron- 
dack railway I had seen its dark waters dashing over the rocks in 
its channel and had imagined it would be a paradise of stone flies; 
and such it may have been in times past, but since the construction 
of the dam and controlling works at the outlet of Old Forge pond, 
