Studies of North American Plecoptera with Special Reference to the Fauna of Illinois
Frison TH. 1942. Studies of North American Plecoptera with Special Reference to the Fauna of Illinois. Illinois Natural History Survey Bulletin. 22(2):1-130
ABSTRACT: This paper is a result of the continuance of studies of the stonefly fauna of Illinois started in 1926 and expanded within more recent years to include the fauna of North America. Three previous papers of mine have dealt entirely or in part with Illinois material of these aquatic insects ; the first dealing with the fall and winter species only (1929), the second with all the then known Illinois species (1935rt') and the third with additional information and recordings of species (1937).