1 70 A NATURALIST IN THE GREAT LAKES REGION 



Fig. 178 



have very prominent eyes, a very large labium, and the abdomen 

 is scarcely narrowed at all until the ninth segment. There is a 

 black band between the eyes and a black band encirchng each 



femur. The adult Lestes is rather dull colored, 

 and when it rests, the wings are held as a rule 

 spread horizontally rather than folded over the 



back, as other damsel flies hold 

 theirs. The full-grown dragon fly 

 of Tramea lacerta has a wing- 

 spread of nearly 4 inches. The 

 body is dark, almost black. The 

 "A"' upper surface of the abdomen 



^ „ ,,. ' '^ -r bears white or sfreenish spots. It 



Figs. 178, 179: Iig. 178. — ^Jaws ^ r 



of nymph of Lestes forcipatus, after ^les from June to September. 

 Xeedham; Fig. 179.— Nymph of C. eponina (Fig. 180) has a wing- 



dragon fly, Celethemis eponina. ^^xQ^d of about 3 inches. The 



thorax is red-brown with black stripes. The abdomen is black 



with yellow spots. The triangle is covered with a spot, and 



there are two bands, 



sometimes reduced to 



spots, on each wing. 



It also flies from June 



to September. 



Lampsilis luteal a 

 (Fig. 181) has a 

 smooth shell with 

 distinct narrow green 

 rays. It is about 

 twice as long as high. 

 It is good sized, 

 usually 3r5 inches long and quite thick. The muscle scars and 

 cardinal teeth are plain on the inside of the shell. 



Alasmodonta marginata (Fig. 182) is rayed with broad green 

 radiating lines. In outline it is quadrate, the posterior region 

 being truncate. The umbones are marked by three distinct 



Fig. 180. — Adult dragon fly, Celethemis eponina. 

 After Needham. 



