Some Dragonflies of Northwest Iowa

The summer of 193l was very dry in Northwest Iowa and many of the bayous or ox-bow lakes along the Missouri River became very shallow. This condition was favorable to the dragonfly and millions of them hovered over the stagnant water. One could not walk along the receding shores and escape being struck by the flying insects. The author decided to collect them and classify them to determine how many might be found in this region. Collection was begun on May 16 and continued until September 28 when most of the flies were gone. Thirteen species were found representing nine genera