156 Journal New York Entomological Society, t^'°'- -^>^n. 



flavescent but unmarked wings, tlie males clearer winged, but with 

 dark {ips to the hind ones. They were fairly numerous, and, flashing 

 back and forth over the brook, with the sunlight making resplendent 

 the long blue-green metallic abdomens of the males and the more 

 coppery females with their bright yellow sides, the community pre- 

 sented a never to be forgotten scene. The males frequently indulged 

 in contests, usually two, sometimes three, taking part in vigorous 

 chasings and dodgings which would be maintained for several minutes 

 at a time, when they would separate, resume their hunting, then 

 suddenly renew the game. While they never seemed actually to close 

 in battle, yet the performance strongly suggested conflict, and bore 

 little resemblance to the graceful dance of A. macnlatum. 



Soon after the dip of the sun back of the steep hill forming the 

 brook's western bank, these Agrions began to seek rest from their 

 labors, perching on the leaves of bordering shrubs and trees at heights 

 ranging from six to twelve feet up, where they doubtless spent the 

 night. 



It was the writer's first introduction to this species, so there was 

 added the joy of discovery to the aesthetic delight a colony of such 

 beauty must have given any beholder. 



A hemlock-shaded, rockbound pool setting off from the main 

 course of the brook proved to be the home, or resort, of the more 

 familiar Cordulcgastcr diaslatops. ¥ron\ time to time one of three 

 or four individuals would leave its resting place on the low branch 

 of an overhanging bush, and sweep with lightning speed over its 

 clear depths; then circling its shores from end to end it would reach 

 and follow the narrow grass-arched connecting channel out to the 

 stream and back. On one of these forays the capture of an Argia 

 putrida was noted. It was done in the twinkling of an eye, in spite 

 of the activity and apparent agility of the prey. The dragon saw the 

 damsel, seized her, and that was the end of her story. With his 

 quarry he rose at once and almost vertically to a branch at the height 

 of about forty feet, where he proceeded to the undisturbed enjoyment 

 of his meal. This seeking of a lofty altitude for that purpose seems 

 to be customary with members of this genus, it having been noted 

 on several occasions in the case of both this species and C. ohliquns. 



Although several s])ecies of Libellulid<e were observed, they were 

 probably for the most part wanderers ; the character of this part of 



