THE CANADIAN ENTOMOLOGIST. 



31 



B. Not more thin 5 antenodal veins in either 



series Family Agrionidce 



RR. More tlian 5 antenodal veins in either 



series Family Ca/opfe'rjgidce. 



A A. I^ycs usually not far apart, — iiind wings broad at base, and the wings 

 are held extended horizontally by the insect when not 

 Hying (True Dragon-flies.) 



C. The two series of antenodal veins not corresponding. 



D. Eyes widely separated Family Gomphidce 



DD. Eyes touching only. . . . Family Cordulegasieridce. 

 DDI). Eyes meeting for some distance.. Y:x\\-\\\y Aesc/midcc. 

 CC. The two series of antenodal veins corre- 

 sponding Family Libelluhdce. 



Of the above six families the Agrionid?e and the Libellulidas contain 

 by far the greater number of species ; the Cordulegasteridce have only a 

 {t\\ species, all of which are rather uncommon. 



* Fig. I. — One of the LibellulidcTe, or true Dr.igon-flies. Note that the 

 hind wings are broad at base and the eyes meet 

 on the head. In this figure the second series of 

 antenodal veins is easily seen and they correspond 

 with the first series. (vSee Key to I'^amilies). 



Fic. 2. — One of the Agrionida? or Damsel- 

 tlies. Note that the liind wings are narrowed at 

 base and that the antenodal veins are not numer- 

 ous or close together. The eyes arc widely 

 separated. (See Key to P'amilies). 



Fig. 3. — A young or nymph of one of the Dragon' 

 flies. Note the buds of wings or wing-pads, and 

 that the general shape of the body is quite similar 

 to that of the adults. 



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