236 NEW TOltK STATE MUSEUM 



1898 Lestes InequaHs Dayis, N. T. Ent. Soc. Jour. 6:196 (liste* 



from Staten Island) 

 1898 Lestes inequalis Kellicott, Odon. Ohio, p.21, fig.22 

 1900 Lestes inequalis Williamson, Dragon Flies Ind. p.260, pl.7, 



flg.6 

 This species is as yet known only from Staten Island, but is- 

 very likely to be found elsewhere. Its nymph is unknown. 



Subfamily agrioninak 



KEY TO GENERA 



Imagos 

 a Spines on the tibiae very long, twice as long as 



the intervals between them Argia 



aa Spines of the tibiae hardly longer than the inter- 

 vals between them 

 6 No pale postocular spots on the top of the head; 

 sexes similarly colored 

 e Colors of dorsum blue and black; yellow 



beneath the thorax Chromagrioa 



cc Colors of dorsum red and black; stout species AmphiagrioQ 



ccc Dorsum bronzy green; slender species. Nehallennia 



6& With round or ovoid postocular spots on the 

 bead 

 d Sexes with a general similarity in color, the 

 female often of a lighter shade; no up- 

 turned, bifid process arising from the 

 apex of the 10th abdominal segment 

 (except in the species last in our list); / 



the superior abdominal appendages of 

 the male not strongly directed downward 



and inward Bnallagma 



dd Sexes strikingly unlike in color; a bifid pro- 

 cess arising from the apical margin of 

 the 10th abdominal segment in the male 

 and the superior abdominal appendages 

 strongly directed downward and inward 

 e Males chiefly green and black, with nor- 

 mal rhomboidal pterostigma; females 

 with the orange of the iibdomen cover- 

 ing something less than the three basal 

 segments (becoming wholly densely 



pruinose with age) Ischnura 



ee Males yellow or orange, with ovoid 

 stigma which does not reach the costal 

 vein; females with the four basal seg- 

 i ™ents of the abdomen yellow or orange.Ano mal ag ri o n 



