84 DRAGONFLIES OF OHIO. 



Colors brown, fuscous and green. Male; markings 

 on thorax and abdomen are variable in different speci- 

 mens. There are only two cells in the anal triangle of 

 hind wings which at once separates it from constricts.. 

 Superior appendages as long as 9+10, narrow at base, 

 superior longitudinal carina not denticulated, apex 

 with a short thorn directed obliquely downward. 

 Inferior appendage one half as long, conical, angular 

 at apex. 



Female of the same form as the male, appendages 

 narrow at base, oblong, rounded at apex, obscurely 

 mucronate. Genital valve as long as 9 with a lateral 

 emargination ; apex not strongly elevated. Vulvular 

 process short, not over one millimeter. The appen- 

 dages only a little more than half as wide as in con- 

 stricta, This description was taken from a female 

 taken in copulation. When more material is procured 

 it may be necessary to verify- some statments. 



This species flies with constricta but is not nearly 

 so common. 



JEtSchna clepsydra, Say. 



Length of abdomen, cJ 51 + 50, hind wing d 44, 

 ? 43. 



Colors brown, fuscous and green. Head, front 

 green, nasus and rhinarium fuscous or brownish in 

 some specimens. Mandibles and margins of mouth 

 fuscous, a fuscous T spot above; occiput yellow in the 

 middle, remainder fuscous ; rear of eyes fuscous. 

 Thorax brown, an antehumeral stripe and two lateral 

 stripes green, also green between the wings above ; 

 femora and tibiee brown above, fuscous beneath, tarsi 

 fuscous ; wings and pterostigma fuscous above, yellow- 

 ish beneath, costa yellowish, other veins fuscous ; anal 

 triangle of two cells, membranule small. 



Abdomen constricted at 3, fuscous marked with 

 green ; mid-dorsal carina present ; appendages as long 



