78 NEUROPTERA OF NORTH AMERICA. 



exteriorly : abdomen yellow, segments 1 — 2 dorsum brassy-green, 

 3 and 6 with a very narrow dorsal spot before the apex, 4 and 5 

 with a basal acute spot and an apical orbicular one, *I the dorsum 

 entirely, and the eighth with a quadrangular basal spot brassy- 

 green. (The markings in the younger individuals are very varia- 

 ble; the second segment has the dorsal spot incised each side before 

 the apex, 3 with the dorsal spot interrupted, ? with the basal spot 

 bifid, 8 and the following ones entirely yellow ; sometimes 3 — 6 

 have a basal stripe, and the apical spot .almost obsolete, and 1 — 

 10 yellow.) The tenth segment has a long process upon the mid- 

 dle, which is oblique, cylindrical and bifid at the apex ; append- 

 ages short, yellow, superior ones broader, incurved, broadly bifid, 

 inferior ones a little longer, unguiculated ; wings ^hyaline, ptero- 

 stigma of the posterior ones rhomboidal black, of the anterior ones 

 very singular, larger, rufous, surrounded with yellow, and not 

 attaining to the costal margin ; seven postcabital cross-nervules. 



9 Head orange, having a broad brassy-green, transverse stripe ; 

 posterior lobe of the prothorax produced in the middle ; dorsum 

 of the thorax orange, with a broad brassy-green stripe ; sometimes 

 a black humeral line ; sides yellowish ; feet pale yellow ; abdomen 

 orange, segment 6, a dorsal line dilated at the apex, 1 — 9 dorsum 

 brassy-fuscous, 9 having a yellow middle fascia ; posterior margin 

 of 10 entire ; ventral spine of 8 almost absent ; appendages short, 

 trigonal, thick, yellow; wings hyaline, pterostigma of each of the 

 wings regular, yellowish. 



Var. 9. Brassy-black, pruinose, thorax and abdomen with the 

 sides yellow ; the feet exteriorly lineated with black. 



Length 23 — 27 millim. Alar expanse 23 — 30 millim. 



Hah. Indiana (Say); Maine (Packard); Mass. (Scudder) ; Ma- 

 ryland (TJhler); Bergen Hill, New Jersey (Guex.); Savannah, 

 Georgia (Osten Sacken); Louisiana (Schaum); Florida (Osten 

 Sacken, Norton); Pennsylvania (Haldeman); Cuba; Merida; 

 Yenezuela. A common species. 



The form of the pterostigma in the anterior wings of the male 

 is very singular ; no other species of Odonata have the pterostigma 

 so separated from the costal margin. 



8. A. capreolus! 



Agrion capreolus Hagen! 



Brassy-black, head in front, and an occipital point each side 



