AGRION. 8T 



Subgenus Ariou CHARP. 



26. A. annexum! 



Agrion annexum Hagen! 



Black, brassy; head and thorax villous ; head marked with blue- 

 black (g ), or reddish-yellow (9); occiput each side with a large 

 spot, which is serrated posteriorly; hind lobe of the prothorax 

 rounded, subexcised on each side ; dorsum of the thorax black, 

 brassy, each side with a broad blue stripe (J*), or reddish-yellow; 

 sides blue, or reddish-yellow, with an abrupt black, middle line ; 

 feet black, femora interiorly, tibiae exteriorly (J*) or base exter- 

 nally (9) pale; abdomen (^ ) blue, the first segment with a basal 

 spot, segment 2 with an orbicular, pedunculated apical one, 3 5 

 with the apical half anteriorly hastated, 6 T almost entirely, and 

 10 entirely black-brassy ; 8 and 9 are blue, with a black point each 

 side on the middle; margin of 10 excised in the middle; append- 

 ages short, black, superior ones cylindrical, obtuse, straight ; the 

 inferior ones a little longer, trigonal, subunguiculated; (9) red- 

 dish-yellow; segment 1 with a basal spot, 2 with a dorsal stripe, 

 dilated before the apex, the rest with the dorsum fusco-aeneous ; 

 3 8 have each side a triangular, larger, reddish-yellow spot; the 

 margin of the tenth segment cleft in the middle; ventral spine of 

 segment 8 long, acute; appendages short, thick, black; wings hy- 

 aline, pterostigma rhomboidal, large, fuscous; fourteen postcubital 

 cross-nervules. 



Length 35 37 millim. Alar expanse 43 50 millim. 



Hal. Sitka (Eschscholz; Berlin Museum). 



Allied to A. cyathigerum Charp., of Europe. 



27. A. durum ! 



Agrion durum Hagen ! 



Black-brassy, head and thorax villous; (^ ) marked with blue, 

 or (9) with yellowish-red; allied to the preceding species, but 

 may be distinguished from it by the occipital spots being narrow, 

 cuneiform, not posteriorly serrated; the prothorax has the posterior 

 lobe rounded, not subexcised ; the dorsum of the thorax has a 

 middle line, which is blue or reddish-yellow ; the feet pale, femora 

 exteriorly and the tibia3 interiorly black, tarsi pale; abddmen ( J"), 

 segments 3 6 nigro-aeneous at the apex, longly hastated ; supe- 



