5l6 NEW YORK STATE MUSEUM 



? Celithemis ornata Rambur 



1842 Libellula ornata Rambur, Ids. Neur. p. 96 

 1861 Diplax ornata Hagen, Synopsis Neur. N. Am. p. 182 

 1861 Diplax amanda Hagen, Synopsis Neur. N. Am. p. 183 

 1893 Celitliemis ornata Calvert, Am. ent. soc. Trans. 20: 261 (description) 

 Maine to Florida along the coast ; not as yet recorded from this state. 

 Nymph unknown. 



LEUCORHINIA 



A single species, the common L. intacta, has been recorded 

 hitherto from this state. A second species is now added, L. g 1 a c i a 1 i s , 

 which was common at Saranac Inn. I have bred, and describe below 

 the nymphs of both these species, as well as the female imago of the 

 latter species which has not hitherto been known. 



Imagos of this genus flit about the vegetation of marshy shores, or go 

 foraging along weedy roadsides near by. Their flight is not long sus- 

 tained, consisting mainly of short sweeps from one resting place to another. 

 The nymphs clamber among the submerged stems of aquatic plants. 

 They are smooth, clean, and generally show a definite and well marked 

 color pattern, of brown on a greenish ground, harmonizing well with the 

 environment of mixed green and dead stems. They agree in having the 

 eyes laterally prominent, but a little less so than in Celithemis, 

 lacking the tendency toward the lateral angulation seen in that genus, in 

 having a larger number of lateral setae on the labium (lo-ii), in having 

 the abdomen a little narrowed beyond the sixth segment, and the dorsal 

 hooks on segments 5-8 sharply bent posteriorly just above their bases, 

 and long — as long as their respective segments — and very sharp. 



Our two species may be separated by the following keys. 



KEY TO SPECIES OF LEUCORHINIA 



Imagos 



a Inferior appendage of the males bifurcated ; generally, a yellow twin spot on 

 the dorsum of the seventh abdominal segment; females with the two lobes 

 of the vulvar lamina long and slender, each much longer than wide 



intacta 



aa Inferior abdominal appendage of the male not bifurcated, with only a 



shallow angular notch in its end, no twin spot on segment 7; vulvar 



lamina of the female with its two lobes little developed, much shorter than 



broad glacialis 



Nymphs 



a Dorsal hook of the eighth abdominal segment directed straight posteriorly 



at its apex ; lateral setae 10 intacta 



aa Dorsal hook of the eighth abdominal segment strongly declined at its tip; 

 lateral setae 11 resting on the dorsum of the ninth segment glacialis 



