1910[ Ris, the Identity of Ttvo Odonata FosHls. 105 



be anomalous for Trichocnemis as well as for Argia or any other 

 Agrionine. Besides Argia, there could be thought of Amphia- 

 grion sauciuin, of the Chilian Antiagrion, or of the group repre- 

 sented by the "Agrions" figured by Perkins in the Fauna Hawai- 

 iensis and which I dare say are perhaps more like Antiagrion 

 than anything else (only I have not seen them in nature). Indeed, 

 there is material enough in America to compare with Scudder's 

 Florissant specimen and little reason to go to India to look for 

 its allies. 



Rheinau, Switzerland, 

 April 12, 1910. 



