226 NORTH AMERICAN INSECTS. 
Figure 63, 
Horned Corydalis—Female. 

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The Day-rry (Ephemera vulgata) is another interesting 
genus of this order, and perhaps the most wonderful of all 
in its brief history and sudden transformations. It is an 
inhabitant of Europe as well as of America, and may often 
be seen in great numbers emerging from the surface of our 
rivers, lakes, and ponds. In their perfect or winged state 
they live only a short time, as their name implies, many of 
