Our Gomphus lividus, Selys, is Gomphus sordidus, Selys, and Gomphus externus, Selys, is Gomphus crassus, Hagen.
The following species have been added:
1. Lestes eurinus, Say, taken June 3, 1900, by E. B. Williamson in Portage County. Numbers of both males and females of the species were taken on Cedar Point, at Sandusky, July 10 of the present year.
2. Progomphus obscurus, Ramb., first taken at Ironton, June 1, 1899, by R. C. Osburn. The present year I took several specimens at Vinton, June 10th.
3. Gomphus abbreviatus, Hagen, (?) was taken at Loudonville, June 10, 1899, by J. B. Parker and R. C. Osburn. The species was common at the same locality June 14, of the present year.
4. Neurocordulia obsoleta, Say, has been taken at Cincinnati by Chas. Dury and his associates for three consecutive seasons.
5. Neurocordulia yamaskanensis, Prov., was procured on Rattlesnake Island in Lake Erie, June 28, 1900, by Prof. Osborn.
6. Nasiæschna pentacantha, Rambur, was taken near Kent, Ohio, June 21, 1900. In company with R. C. Osburn we procured three pairs of this species. Others were seen.
DRAGONFLIES TAKEN IN A WEEK.
Raymond C. Osburn and James S. Hine.
During the week beginning June 17th, we collected insects and fishes in the region of small lakes near Kent, Ohio. A list of the Odonata taken during that week is interesting, as it shows the richness of the Odonat fauna of north-eastern Ohio and also the number of species of this group that may fly in a certain locality at the same time.