A LIST OF THE STONEFLIES, PLECOPTERA, KNOWN TO OCCUR IN SOUTHEASTERN OHIO1

During 1939-1941 collections of stoneflies were made from most of the larger streams and many of the smaller ones in non-glaciated Southeastern Ohio. Athens County was covered very thoroughly and as many trips as possible were made into neighboring counties. The main stream of the Hocking River and some of its smaller branches, Federal Creek, Queer Creek and Salt Creek yielded considerable numbers of specimens. Sunday Creek, Monday Creek and Raccoon Creek were relatively without stonefly populations. Many specimens in the Ohio University Collection were made available to the author by Dr. Wm. C. Stehr, who also gave many suggestions in the conduct of the survey and generously helped with the problem of transportation. The late Dr. T. H. Frison of the Illinois Natural History Survey kindly checked all deter-minations. To both of these men the author expresses his appreciation. Altogether twenty-four species of stoneflies were collected during the survey. A few additional records of the same species and five species not taken during the study were found reported for Ohio in published works on the stonenies of North America. These have been added to our list and acknowledgment is there made of the source of the data. A few of these are from the glaciated section of Ohio and it is likely that a survey of that portion of the state will yield some additional species for Ohio. Distribution is given by counties. The names of collectors follow the county records. Since the most of the records are from collections by Wm. C. Stehr and John D. Walker, their records are designated by the letters 5 and W respectively. Most of the specimens on which these records are based are either in the collectio