KELLICOTT. 7 



3. Family Libellulid^e. 



( 6 ) Sub-family Cordulinae. 

 (7) Sub-family Libellulinae. 



Key to the Foregoing Subfamilies. 



1. Wings alike, closed vertically in repose, eyes far separated 2 



Not as above 3 



2. More than two antecubitals (1) Calopteryginee. 



Only two antecubitals ( 2) Agrioninas. 



3. Antecubitals of the first and second series, not corresponding 



throughout 4. 



Corresponding throughout 5. 



4. Eyes separated by a wedge-shaped occiput (3) Gomphinse. 



Eyes barely touching (4) Corduligasterinse. 



Eyes touching for a short distance (5 ) Aeschninae. 



5. Eyes tuberculated behind (6) Cordulinse. 



Eyes not tubercled (7 ) Libellulinas. 



THE FIRST SUB-FAMILY. 



CALOPTERYGIN^E. 



The species of this sub-family are among the most 

 beautiful of dragonfiies. Their bright metallic colors, 

 their clouded arid reticulated wings, their slender and 

 graceful bodies at once attract attention. Their flight 

 is not strong and they seldom wander far from the 

 grassy borders of native pond or stream, where in turn 

 they are to deposit their eggs and where their 3 r oung 

 are to be matured. While our species are few, most of 

 them are common and occur everywhere; they belong 

 to genera determined as follows : 



1. Basilar space free, wings broad Calopteryx. 



2. Basilar space reticulated, wings narrower Hetasrina. 



CALOPTERYX, Leach. 



Only two species are known within our limits. 

 Two different species — C. elegans and C. dimidiata, 



