AGRION. 85 



Subgenus Pyrrhosoma CHARP. 



21. A. saucium ! 



Agrion saucium Barm. ! Handb. II, 819, 10. 



Red; head above black , or middle blackish-fuscous 9 ; pos- 

 terior lobe of the prothorax short, the middle sub-depressed; dor- 

 sum of the thorax black J" , or red 9 , sides yellowish-red ; feet pale 

 yellow ; abdomen red ; the seventh segment has the sides at apex 

 black, and the remaining segments are entirely black ; 9 apex of 

 the seventh segment each side with a point, and 8 and 9 are en- 

 tirely black ; appendages short, red, the superior ones depressed, 

 flat, narrow, subsinuated; inferior ones a little longer, unguicu- 

 lated ; the tenth segment has the middle of the posterior margin 

 elevated, excised; appendages of the female short, red, trigonal; 

 the eighth segment with a longer ventral spine; wings hyaline, 

 pterostigma rhomboidal, fuscous; 11 8 postcubital cross-ner- 

 vules. 



Length 26 22 millim. Alar expanse 31 2T millim. 



Hob. Washington, Trenton Falls (Osten Sacken); Maryland, 

 Pennsylvania (Uhler) ; South Carolina (Zimmerman) ; Illinois 

 (Kennicott) ; Maine (Packard) ; Mass. (Scudder). 



22. A. salvum ! 



Agrion salvum Hagen ! 



Red ; head above with a broad brassy-green stripe ; the poste- 

 rior lobe of the prothorax broader, rounded, each side sub-excised ; 

 dorsum of the thorax red, upon the middle a broad brassy-green 

 stripe excised each side at the wings ; sides yellowish-red, with 

 a superior short stripe brassy-green upon the middle ; feet yellow- 

 ish ; abdomen red, venter paler ; margin of the tenth segment ex- 

 cised in the middle ; appendages short, red ; superior ones cylindri- 

 cal, straight, acute with a tooth inferiorly before the apex; inferior 

 ones a little longer, unguiculated, subrecurved; (9 apex of the 

 abdomen wanting;) wings hyaline, pterostigma rhomboidal, fus- 

 cous ; 9 11 postcubital cross-nervules. 



Length 28 millim. Alar expanse 31 millim. 



Hab. Mexico (Deppe). 



