ARTHUR DKVVITT WHEDOiX 437 



Plate XXVII 



Structure of the imagoes: Aeshnidae 



Fig. 31. — Anax Junius 9 opened dorsally and spread, exposing the muscles 



(alimentary canal and nerve cord removed). (X 25) 

 Kig. 32. — Anax Junius 9. The right half of the abdominal tip containing the 



viscera, segments seven to ten. Camera lucida. (X 4) 

 Fig. 33. — Aeshna umbrosa cT. Muscles of the fifth segment. Camera lucida. 



(X4) 

 Fig. 34. — Anax Junius 9. Muscles of fifth segment. Camera lucida. (X 4) 

 Fig. 35. — Anax Junius d'. Muscles of fifth segment. Camera lucida. (X 4) 

 Fig. 36. — Aeshna umbrosa <f. Segments one and two opened dorsally exposing 



the muscles of the copulatory organs. Camera lucida. (X 3^) 



Plate XXVI II 



Structure of the imagoes: Libellulidae 

 Fig. 37. — Tramea Carolina 9 teneral. Specimen opened dorsally and spread 

 out, and the viscera removed, exposing the muscles and nerve 

 cord. (X 4) 

 Fig. 38. — Tramea Carolina 9 teneral. The alimentary canal of the same speci- 

 men as used above. Note its inflated condition. (X 4) 



Plate XXIX 



Structure of the imagoes: Lil)ellulidae 

 Fig. 39. — LibeUula pulchella cf. Tergum and viscera removed leaving the 



muscles below and the reproductive organs. (X 4) 

 Fig. 40. — LibeUula pulchella cT. Tergum of above. (X 4) 

 Fig. 41. — LibeUula pulchella 9 . Part of the reproductive organs, in tlie eighth 



segment. (X 4) 

 Fig. 42. — Perilhemis domitia cf , with the tergum removed to show the muscles 



of segments four, five and six. ( X 8) 



TRANS. .\M. EXT. SOC, XLIV. 



