I I 2 



Cincinnati Society of Natural History. 



forenoon until dark of warm days, exploring every corner among the 

 obstructions at the water's edge; an interesting habit noted was that it 

 would often fly out and carefully examine a passing skiff. The 

 females when not ovipositing are suspended from some over-hanging 

 twig. 



7. Basiceschna janata was not uncommon at Columbus, May 1. 



8. Macroglia illinoiensis was common along the Muskingum, 

 June 18. 



9. Tetragoneuria cynosura sparingly present at Sugar Grove, 

 May 18, was in great numbers at Reservoir Park, May 25, and at 

 Delaware, May 30; by June 15, its time had passed, when only a 

 rare and worn example was to be found. 



10. Pantala flavesce?is. Six males and five females were cap- 

 tured at Port Clinton. August 15. They were resting in the herbage 

 bordering the lake shore; September 28, several were met with flying 

 by the canal at South Columbus. 



11. Tramea /^r^te was common at Reservoir Park, June 14, 

 and at Cincinnati and Franklin, July 11-19. 



12. Libellula semi 'fasciata was abroad at Columbus, April 28; it 

 was the first of its genus to take wings. 



13. The species of Diplax which was with doubt referred to 

 costifera (No. 62) I find is not that species. Its wings and size agree 

 but the male appendages do not. No additional examples have been 

 taken. 



Eighty-six species and varieties have been enumerated in this 

 catalogue. All but one, are represented by one or more specimens in 

 the collection of the Ohio State University. More or less collecting 

 has now been done in every quarter of the state, still there are 

 several promising fields not yet adequately explored ; notably north- 

 eastern Ohio and especially about the lakes of Summit County. In 

 view of this and after carefully considering the local lists, not forget- 

 ting the fact that two species not hitherto recognized in the state have 

 been found this past summer within five minutes walk of my depart- 

 ment chair in the University, I am convinced that it is not unreason- 

 able to estimate the number of Odonates at present inhabiting Ohio 

 at one hundred. 



It is the intention to continue to search and to print from time to 

 time additions to the catalogue as new studies are completed and more 

 species are taken until the habits, histories and distribution of our 

 Dragon -flies are much better known than at present. 



