436 MORPHOLOGY OF THE ABDOMEN IN THE ODONATA 



Plate XXiy 



Structure of the larvae^: Libellulidae 



Fig. 13.—Tramea Carolina 9 . Sternal muscles, dorso-ventral muscles, th6 



subintestinal transverse muscle, and the nerve cord. (X 5) 

 Fig. 14. — Tramea Carolina 9 ■ Dorsal .view of the alimentary canal and trans- 

 verse muscles. (X 5) 

 Fig. 15. — Tramea Carolina. Lateral and dorsal muscles of the left side as seen 

 • through the transparent skeleton, segments four to eight. (X 5) 

 Fig. 16. — Tramea Carolina 9 . Tergum of the specimen u.sed in fig. 13 showing 

 the tergal muscles and the heart. (X 5) 



Plate XXV 



Structure of the imagoes: Zj-goptera 

 Fig. 17. — Megaloprepus coerulatus 9, the first three segments split along the 



mid-dorsal line and spread out showing the muscles. (X 4) 

 Fig. 18. — Megaloprepus coerulatus 9 : the nerve cord removed and laid to one 



side, the ganglia being at their normal level. (X 4) 

 Fig. 19. — Calopleryx tnaculala cT. A lateral view of the alimentary canal. 



(X4) 

 Fig. 20. — Calopleryx maculata cT. The superior tergal muscles of the fourth 



and fifth segments. (X 4) 

 Fig. 21. — Calopleryx maculata cf. The superior and inferior tergal muscles of 



the right side of segment four. ( X 4) 

 Fig. 22. — Calopleryx 7narulata 9 larva. The posterior part of the alimentary 



canal showing the regions from the mid gut to the anus. (X 8) 

 Fig. 23. — Calopleryx maculata cT. Ventral half of the abdomen (dorsum re- 

 moved) showing the muscles and nerve cord. (X 4) 

 Fig. 24. — Lestes imffuiculat^is 9 . The tip of the abdomen split into right and 



left halves showing internal organs, and air spaces. (X 4) 



Plate XXVI 



Structure of the imagoes: Aeshnidae and Gomphidae 



Fig. 25. — Anax Junius 9 spUt dorsally and spread out: reproductive organs, 



nerve cord, and alimentary canal (in dotted outline). (X 2) 

 Fig. 26. — Anax Junius cf. Reproductive organs. (X 2) 

 Fig. 27. — Hageniu^ brevistyltis 9. Dorsal view of abdomen. (X 2) 

 Fig. 28. — Hageniusbrevistylus (f. Lateral view of abdomen. (X 2) 

 Fig. 29. — Hagenius brevistylus d'. Dorsal view of abdominal tip. (X 2) 



(nearly) . 

 Fig. 30. — Hagenius brevistylus d' larva. Ventral view of abdomen. (X 2) 



(nearly). 



