492 



NEW YORK STATE MUSEUM 



side of the bay in Blueberry island, and on the outside of the cape which 

 projects across the outlet, and found the number averaged 30 to a meter 

 in distance along the shore line. When one reflects that there were miles 

 of favorable shore line in this pond, the number of images suggested by 

 a little calculation will account for a considerable quantity of eggs. 



2) I hatched thousands of these eggs. While the nymphs of Libellu- 

 lidae, when new-hatched, look much aHke, these showed corduline char- 

 acters quite as much like Tetragoneuria as any other. 



Fig. 20 Lateral and dorsal views of the abdomen of the nymph of Tetragoneuria cynosura 

 Say. a Appendages ; h dorsal hooks ; s lateral spines 



Of the three species found at Saranac Inn I bred two species of the 

 nymphs, and found other nymph skins which I have below referred by sup- 

 position to the other species (T. spin OS a). The recognition charac- 

 ters for images and nymphs of the four species of the state are given 

 below in tabular form. 



