C. H.  Kennedy, ?Forty-Two Hitherto Unrecognized Genera and Subgenera of Zygoptera?, The Ohio Journal of Science, vol. 21, no. 2, pp. 83 - 88, 1919.

C. H.  Kennedy, ?The Phylogeny of the Zygopterous Dragonflies as Based on the Evidence of the Penes?, The Ohio Journal of Science, vol. 21, no. 1, pp. 19 - 29, Plates 1-3, 1919.