170 



Cincinnati Society of Natural History. 



seen flying about some puddles near Little Miami River. 

 They were ovipositing in these pools, which dried up entirely 

 a few days later. Are all these eggs lost? Taken here by Pro- 

 fessor Kellicott, July 18, 1895. 



Tramea lacerata Hagen. Very abundant from May to 

 October. The male of this species, when flying around in 

 couple, holds the female with his claspers just back of the 

 head, and seems to steer to a suitable place. The} 7 poise a 

 few inches above the water, and, as the female dips downward 

 with the tip of her abdomen into the water, the male releases 

 his hold, eggs are deposited, the male then regains his hold, 

 and they fly up and around again. 



Trajnea Carolina Linne. 



Tramea onusta Hagen. At Linden Lake they were numer- 

 ous, but quite difficult to catch. Several pairs were observed, 

 ovipositing, May 17 to June 30, 1898. On May 17, 1899, I 

 went to Linden Lake to secure a few onusta where I had taken 

 them the year before. I took four specimens of Carolina, 

 which were flying abundantly, but not one onusta was ob- 

 served during 1899. 



Libellula basalts Say. On July 14, one of this species was 

 captured in the act of chewing up a Hippodamia. 



Libellnla auripennis Burmeister. 



Libellula cyanea Fabricius. Three male specimens were 

 taken at Spring Grove, June 6, 1899, flying low along the 

 border of a shallow lake ; no female was seen. 



Libellula vibrans Fabricius. Specimens of this most beauti- 

 ful species were flying, May 28, 1899, along a branch of Duck 

 Creek; they were fresh and bright. 



Libellula incesta Hagen. 

 Libellula semifasciata Burmeister. 

 Libellula pulchella Drury. 

 Plathemis trimaculata DeGeer. 

 Celethemis eponina Drury. 



4 'SM 



