AGRION. 97 



ment is sometimes all blue J\ Specimens from Venezuela are 

 smaller, but hardly distinct ; their females have the head marked 

 each side with a luteous, occipital point ; hind margin of the pro- 

 thorax slightly sinuated ; laminated process near each side of the 

 thorax short, curved inwards; dorsum of the thorax luteous, a 

 cupreous stripe upon the middle ; sides yellowish-green, with a 

 brassy stripe above j abdomen yellowish-green, each side with an 

 interrupted, black stripe ; wings hyaline, pterostigma rhomboidal, 

 black (J^), or luteous (9); fifteen postcubital cross-nervules. 



Length 40 — 33 millim. Alar expanse 48 — 40 millim. 



Hab. Cordova, Mexico (Saussure); Venezuela (Appun). 



46. A. aspersum! 



Agrion aspersum Hagen ! 



Black, varied with blue ; head black, in front and an occipital 

 point each side blue ; posterior margin of the prothorax sub- 

 excised each side ; dorsum of the thorax black, each side with a 

 broad blue stripe ; sides blue ; feet pale blue, femora exteriorly, 

 tibiae interiorly and tarsi almost entirely black ; abdomen black, 

 the sides blue ; segment 1 blue, with a quadrangular, basal, black 

 spot ; 2 blue, with an apical, pyriform, black spot ; 3 blue, with a 

 large, apical, reversed hastiform, black -spot ; the apical half of 7, 

 the whole of 8 and 9, and 10 with a large ovate spot each side 

 blue; margin of the tenth segment subexcised; appendages black, 

 superior ones long, straight, cylindrical, the apex subincurved, 

 with a basal process beneath, which is large, laminated; the infe- 

 rior appendages are short, trigonal, the apex acute, curved in- 

 wards ; wings hyaline, pterostigma small, rhomboidal, black ; 

 twelve postcubital cross-nervules. ( J\) 



Length 35 — 30 millim. Alar expanse 40 — 36 millim. 



Hah. New York ; Bergen Hill, New Jersey (Guex) ; Chicago 

 (Osten Sacken). 



47. A. fumipenne I 



Agrion fumipenne Burm.! Handb. II, 819, 7. — Argia obscura Rambur, 

 Neuropt. 256, 3. 



Fusco-aeneous ; head in front, and an occipital spot each side 

 blue(?); posterior margin of the prothorax rounded, each side sub- 

 truncated; dorsum of the thorax blue(?), a narrow, fusco-aeneons 

 stripe upon the middle; sides blue(?) above fusco-aeneous, a black 



7 



