208 



Cincinnati Society of Natural History. 



in Enallagma it appears to stand in the scheme of Baron de 

 Selys with E. signatum and E. pollutum; on the other hand, 

 I have taken more than one Exsulans with the dorsum of 8 all 

 black, and 9 blue, which coloration would bring Signatum, 

 Pollutum, Exsulans, and Fischcri in the same group. 



It will be a disappointment if most of the following spe- 

 cies do not eventually turn up among our " spindles," viz.; 

 Annexum, Aspo'sum, Durum, Hageni, and Tr aviation . 



26. ISCHNURA VERTICALS Say. 



Very common in all parts visited. The orange females 

 appear to be about one-fourth as numerous as the black 

 variety. It is one of the earliest species on the wing, and one 

 of the last to disappear in autumn. Its range for a favorable 

 season at Columbus is from April 20 to October 10. 



/. Ramburii Selys, although a coastwise species, occurs in 

 Ontario, and may yet appear On this side of the great lake. 

 Likewise Anomalagrion hastatum inhabiting Indiana undoubt- 

 edly occurs in this State. I shall expect to find it at Grand 

 Reservoir. 



(3). Gomphin^E. 



27. Hagenius brevistylus Selys. 



Columbus, June and July. Toledo, August 1. I have 

 nowhere in Ohio found H. brevistylus abundant; in central 

 Michigan (Corunna) it is next to D. spinosus, the most com- 

 mon Gomphid. 



Omphiogomphus rupinsulensis and Tachopteryx thoreyi are 

 both regional, but not yet taken. 



28. Gomphus vastus Walsh. 

 Common at Sandusky in July, 1894. 



They were taken most freely in an open grove of second 

 growth oak and hickory on Johnson's Island. Many pairs 

 were taken resting on the hanging branches of these small 

 trees. South Bass Island, July 5. 



