IIAGEN AND CALVERT: ILLUSTRATIONS OF ODONATA. 119 



EXPLANATION OF PLATES. 



Except where otherwise stated, the figures represent the apex of tlie abiloinen 

 and the appendages of tlie males. For most species two views are giviii, a dorsal 

 and a left profile ; the former is designated by an arable numeral, tlie latter by the 

 same numeral, followed by the letter a. 



plate' 1. 



Figs. 1, la. Argia variabilis. 



Figs. 2, 2a. " meduUaris. 



Figs. 3, ?>a. " insipida. 



Figs. 4,4 rt. " funebris. 



Figs. 5, 5 a. " vivida. 



Figs. 6, 6 a. " extranea. 



Figs. 7, 7 a. " orichalcea. 



Figs. 8, 8 a. " cuprea. 



Figs. 9, 9 a. " translata. 



Figs. 10, 10 a. " sedula. 



Figs. 11,11a, " infuraata. 



Figs. 12. 12 a. " oculata. 



Figs. 13, 13 a. " calida. 



Figs. 14, 14 a. " mollis. 



Figs. 15, 15 a. " eliptica. 



Figs. 16, 16 a. " pulla. 



Figs. 17, 17 a. " violacea. 



Figs. 18, 18o. " funiipennis, 18^>, ventral, and 18c, posterior view of same: t, 

 tubercle on posterior surface of tenth segment; i\ appendix 

 dorsalis of Heymons (Grundziige der Entwickelung u. des 

 Korperbaues von Odonaten u. Ephemeriden, Anliang Abhdl. 

 konigl. preus. Akad. Wiss. 1896) = "inferior appendage" of 

 authors in the Odonata Anisoptera; z, superior appendage of 

 authors (processus caudalis of Heymons) ; //, inferior appen- 

 dage of authors (appendix lateralis of Heymons) ; z, anal 

 aperture. 



Figs. 19, 19 a. " optata. 



Fig. 20. " sordida, major part of labium. 



