AGRION. 91 



segment 8 with no ventral spine; wings hyaline, pterostigraa rhom- 

 boidal fuscous; 11 15 postcubital cross-nervules. 



Length 33 36 raillim. Alar expanse 40 44 millim. 



Hob. Maryland (Uhler); Berkeley Springs, Virginia; Washing- 

 ton (Osten Sacken) ; Pecos River, W. Texas (Capt. Pope) ; Massa- 

 chusetts (Scudder) ; Connecticut (Norton); New York (Edwards); 

 Illinois (Kennicott) ; New Jersey, Pennsylvania (Uhler). 



34. A. fontium ! 



Agrion fontium Hagen! 



Brassy-black; head black, mouth and an occipital spot each side 

 blue; posterior margin of the prothorax short, sub-rect; dorsum 

 of the thorax black, each side of it a broad blue stripe; sides pale- 

 blue, a stripe superiorly and a line upon the middle black; feet 

 black, femora interiorly and tibiae exteriorly pale ; abdomen slender 

 black, segments 4 Y with an interrupted, pale basal ring, dorsum 

 of 9 10 blue, 10 with a medial black fascia, the hind margin ex- 

 cised; appendages short, black, superior ones reniform, broken, 

 compressed; inferior ones larger, broad, excised; wings hyaline; 

 pterostigma rhomboidal black. 



Fourteen postcubital cross-nervules. 



Var. Rosaceous ; dorsum of the thorax each side with a broad 

 rosy stripe ; sides with a rosy point on the superior stripe at the 

 wings; (9) abdominal segments at sides, a dorsal line upon the 

 middle and a basal ring pale; no ventral spine. 



Length 36 millim. - Alar expanse 42 millim. 



Hab. Berkeley Springs, Virginia (Osten Sacken); Georgia 

 (Abbot) ; the variety from Florida (Osten Sacken). 



35. A. apicale ! 



Agrion apicalis Say, Journ. Acad. Philad. VIII, 40, 4. 



Blue ; head with a transverse black stripe above ; posterior mar- 

 gin of the prothorax subrotund; dorsum of the thorax blue, the 

 sutures black; sides blue, against the prothorax, superiorly, a 

 quadrangular black spot (<?); feet pale, femora exteriorly and 

 tibiaB interiorly black ; abdomen brassy fuscous, a narrow dorsal 

 line, a basal annulus to the segments and their sides pale; dorsal 

 surface of the three last segments blue (J*), or brassy fuscous (9); 

 appendages small, the superior ones transverse, with a middle and 



