AGRION. 89 



abdominal segment 2 has an orbicular spot, which is subacu- 

 minate in front, the sides sometimes have a line brassy-black, 3 has 

 an apical spot, acuminated in front, 4 6 brassy-black, with the 

 base blue; superior appendages bifid, no tubercle inserted between ; 

 the abdomen of the female is marked very much like that of Agrion 

 civile (the apex is destroyed); dorsum of the thorax with a middle 

 green line. 



Length 32 millim. Alar expanse 40 millim. 



Jfab. Mexico (Deppe); female from. Trajos del Oro (Saussure). 



30. A. ebrium! 



Agrion ebrium Hagen ! 



Black-brassy, varied with blue ; head and thorax villous ; very 

 closely allied to Ag. civile, differs in having broader occipital spots, 

 the femora and tibiae exteriorly, and sometimes the whole of the 

 tarsi black ; the abdomen has segment 6, upon the apical half, 

 marked with a hastate, black-brassy spot, the superior appendages 

 are bifid, no introduced tubercle, the branches equal, parallel (in 

 A. civile divaricated) ; inferior appendages straight, the apex less 

 acuminated; eleven postcubital cross-nervules. Male. 



Length 29 31 millim. Alar expanse 36 40 millim. 



Hob. Chicago (Osten Sacken) ; North America (Zimmerman) ; 

 New Orleans (Pfeiffer; the specimen is very much mutilated, 

 doubtful). 



31. A. doubledayi ! 



Agrion doubledayi Selys ! Revue des Odonates, 209 ; Poey ! Ins. Cuba, 

 469. 



Black-brassy, varied with blue (J*), or yellowish-green? (9); 

 head brassy-black, in front blue, the occipital spots sublinear; pos- 

 terior margin of the prothorax rounded; dorsum of the thorax 

 brassy-black, each side of it is a broad blue stripe, sides blue, a 

 medial linear spot at the wings; feet pale, femora and tibiae exte- 

 riorly lineated with black; abdomen (J*) blue, segment 1 with a 

 basal quadrangular spot, segment 2 with an orbicular apical one, 

 3 5 with an apical ring, 6 with a large hastiform spot, and 7 and 

 10 entirely brassy-black, 8 9 entirely blue; margin of the tenth 

 segment excised, in the middle somewhat bituberculated ; superior 

 appendages black, broad, thick, the apex excised, with a pale 

 tubercle adjacent; the inferior ones pale, acute, oblique; or (9) 



