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Cincinnati Society of Natural History. 



of both forms, but it stands nearer the outer edge in Walshii and 

 there is a plain sinus just cephalad of the tubercle — seen best at an 

 angle from above ; this is wanting in fraternus, and the superior 

 appendages are slenderer, at least apically, in the variety. 



I have not found the two forms flying together, but this must be 

 accidental for both are abroad at the same season and have similar 

 habits, that is, they fly about the swiftest and most turbulent parts of 

 the river. I have taken many examples of fraternus at Sandusky 

 and McConnellsville, but the variety only as stated above. 



78. — gomphus furcifer Hagen. 



Three males were taken at Reservoir Park, June 14, 1895. 

 They were found resting on floating leaves of Nelw?ibium luteum. In 

 manners and appearance it closely agrees with villosipes although 

 readily separated by differences in anal appendages and by the 

 occipital tubercle, present in villosipes absent in fu?rifer. 



(4. ) CORDULEGASTERIN^E. 



79. — CORDULEG ASTER OBLIQUUS Say. 



One male was taken by E. E. Bogue, at Orwell, in June, 1895. 



(5.) yESCHNIN^. 

 80. — gomph^schna furcillata Say, var. antilope Hagen. 



One male taken at Columbus, June 13, 1895. 



Others were seen from time to time flying about the orchard and 

 garden of the University farm, especially over the glass roofs of the 

 green-houses. 



(6.) CORDULIN^. 



8l. — DIDYMOPS TRANSVERSA Say. 



Five males, Sugar Grove, May 18, 1895 ; one male, Columbus, 

 June, 1895. 



The males fly along the borders of the larger streams in a manner 

 quite similar to Alacromia and are more easily taken. At Sugar 

 Grove serveral pairs were seen at rest on foliage, often near the 

 ground, along a wagon-road near a small river. 



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