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PROCEEDINGS OF TEE NATIONAL MUSEUM. 



VOL. 49. 



angle of 45°. It has an obscure rounded tooth on its outer anterior 

 edge. Some pile occurs on the appendages but not enough to obscure 

 them. The minute spines on the posterior edges of the segments are 

 long as compared with the short blunt spines of vivida. 



In Doctor Calvert's Argia key in Biologia Centrali- Americana, 

 Odonata (p. 72) the species emma runs to funebris, but it differs 



31 



Figs. 31-32.— Argia vivida, male. 31. Dorsal view 32. Lateral view 



sharply from extranea, vivida, ot funebris in the shape of the superior 

 abdominal appendages of the male, the apices of which turn outward 

 instead of inward. Figui-e 42 is a tracing from figure 59 of plate 4 of 

 the Biologia Centrali-Americana, Odonata, wliich was drawn by Cal- 

 vert from the unique type in the Museum of Comparative Zoology. 

 Figures 43-44 are copies of Doctor Hagen's drawings of the same 



