96 NEDROPTERA OF NORTH AMERICA. 



confluent together at the apices of the segments (apex destroyed); 

 wings hyaline, pterostigma rhomboidal, luteo-fuscons; sixteen post- 

 cubital cross-nervules. (9.) 



Length about 45 raillira. Alar expanse 56 millim. 



Hah. Cordova, Mexico (Saussure). 



44. A. putridum ! 



Agrion putridum Hagen I 



Fuscous ; head fuscous, in front luteous ; posterior margin of 

 the prothorax subrect ; dorsum of the thorax luteous, a fuscous 

 stripe upon the middle; sides luteous; a stripe superiorly, which 

 is excised at the wings, and a line upon the middle blackish-brown; 

 feet luteous, femora exteriorly and tibiae interiorly fuscous ; abdo- 

 men black, segments 3 — 7 each side with a pale basal lunule ; head, 

 thorax, and apex of the abdomen pruinose ; margin of the tenth 

 segment excised in the middle ; appendages short, superior ones 

 obtuse, an ante-apical tooth beneath, the inferior appendages 

 broad, truncated at the apex. 9 pale green ; head with a post- 

 occipital black streak; posterior margin of the prothorax straight, 

 each side with a black spot ; laminated process near each side of 

 the thorax small, straight, rounded ; dorsum of the thorax green, 

 a black line upon the middle ; sides green, a black line in the 

 middle; feet paler; abdomen green, each side with an interrupted 

 black line; apex of the tenth segment excised; appendages short; 

 wings hyaline, pterostigma rhomboidal, black (J"), or luteous (9); 

 fourteen postcubital cross-nervules. 



Length 40 millim. Alar expanse 48 millim. 



Hah. Wisconsin River (Kennicott) ; Berkeley Springs, Virginia 

 (Osten Sacken) ; Maryland (Uhler). 



45. A. cupreum ! 



Agrion cupreum Hagen ! 



Coppery-purple ; head cupreous ; posterior margin of the pro- 

 thorax rounded; dorsum of the thorax cupreous, the middle carina 

 black; sides pale, above coppery; feet black, tibiai pale exteriorly; 

 abdomen black, segment 2 fusco-aeneous, 4 — 8 with a basal blue 

 annulus, 9—10 entirely blue; margin of 10 excised, bituberculated 

 beneath ; appendages black, the superior ones flat, subelongated, 

 triangular, bi(id at the apex, the interior branch subincurved ; the 

 inferior ones longer, the apex broader, excised. The eighth seg- 



