ECOLOGY OF ISLE ROYALE. 307 



Pteronarcys dorsata Say. A few larvae from Otter Eiver, in Baraga 

 County Michigan, collected by A. G. Euthven, No. 30791, U. of M. 

 Museum. 



Ephemcrida. 



1. Heptagenia sp.? One pinned female subimago from Isle Eoyale 

 in August, wholly undeterminable; anotlier specimen from Tobin Har- 

 bor on July 20. 



2. Stphlurus sp.? probably S. alternata Say. A larva from the 

 sedge zone of Sumner Lake (III, 5) No. 78 A, on July 29. 



Neuroptera. 



1. Sialis infumata Walker. One larva and one adult were taken on 

 July 26, bv H. A. Gleason, (No. 160) near the head of Eock Harbor 

 (111,3). ' . , , 



