IXSECTA. 189 



the breast striped with yellow ; the ground work of the 

 wings is brown. 



The Golden Green (libellula aena) is of a beautiful 

 golden green color, with black feet and colorless wings ; 

 abdomen club-shaped. 



2. Long-bodied Dragon Flies, with round heads 

 and very long cylindrical bodies, carrying their wings as 

 the genus described above. 



The Great Dragon Fly (seschna grandis), plate 26, 

 fig. 1, is two and a half inches in length, spotted orange 

 and green, the corselet striped with yellow, with trans- 

 parent wings. 



The Black Dragon Fly Devil's Needle (aeschna for- 

 cipata) is something smaller ; black wings, which are 

 yellow below, but spotted brown on the borders. 



The Ephemera (ephemera) have the limbs five-jointed, 

 the eyes close together, and no jaws, like the libellulae ; 

 they carry their wings perpendicularly. The antennae 

 are short, two or three filaments or bristles found at the 

 posterior extremity of the body very long. Their larvae 

 do not form an envelope in which they await their meta- 

 morphosis, but burrow in the banks of streams, and feed 

 on the mud. They have large branchiae on each side of 

 the abdomen, through which they respire. The most 

 remarkable is 



The Ephemera Proper or Shore Fly (ephemera 

 swammerdammi), which has a body more than an inch 

 long, terminating with filaments at the posterior extrem- 

 ity of the same length. These insects usually appear 

 in great swarms on the bright days in summer along the 

 banks of rivers, sometimes for two or three days, but the 

 duration of life in most, as their name denotes, is limited 

 to a single day. Scarcely have the larvae quitted the 



