204 



Cincinnati Society of Natural History. 



There are at least two more species of Argia likely to occur 

 in the State, which have not been found as yet, viz., A. 

 bipunctulata and A. fumipennis. 



1 6. Nehalennia irene Hagen. 



This elegant species was taken at Sandusky, June 26, by 

 W. E. Kellicott. It was common at Castalia, July 11. Many 

 were taken ovipositing among water-crowfoot and algse, in 

 ditches, where the water was kept at a constant level by 

 the famous spring. Milan, July 10. 



17. Nehalennia posita Hagen. 



Columbus, April 23 (Paul Fischer) ; Sugar Grove, Sep- 

 tember 4; Milan, July 10; Oberlin (Lynds Jones). 



18. Amphiagrion saucium Burm. 



Numbers taken near a rivulet of cool spring w r ater at South 

 Columbus, June 16; at Castalia, July 11, not uncommon; 

 Oberlin (Lynds Jones). 



I have taken an occasional female much larger than aver- 

 age size. They are always mingled with the ordinary forms, 

 and not otherwise separable. I have not met this peculiar- 

 ity so strongly marked in any other species. 



19. Enallagma civile Hagen. 



Common at Sandusky in June and July : Licking Reser- 

 voir, July 26; Toledo, August 15; Oberlin (Lynds Jones). 



Under Lestes disjuncta I have referred to a heterogeneous 

 union, viz., the male of Disjuncta and the female of L. vig- 

 ilax ; a still more unexpected combination noticed was be- 

 tween the male Civile and the female of Argia putrida. Both 

 pairs were captured, and are now in the collection. 



20. Enallagma ebrium Hagen. 

 Very abundant at Sandusky from June 23 to July 13, 1894. 



